UPDATE: Diamond Ranch High School Lockdown Lifted

Authorities placed the school on lockdown after a student reportedly made a threatening call.

Final update: 

This was the final message posted by the Pomona Unified School District about the lockdown at Diamond Ranch High School: 

The lock down at Diamond Ranch High School has been lifted.  No evidence of danger was found on the campus. Classes will remain in session until 2:20 p.m. as scheduled. Parents who wish to pick their child up prior to end of the school day may do so at the gym. 

Please note that emergency release protocols will be in place, meaning that only those listed on the students emergency release card will be able to pick up students and picture identification will be required.

We thank you for your patience during this incident. We appreciated the commitment of our local law enforcement officers in keeping our students and staff members safe. All after school activities scheduled for today are cancelled and arrangements will be made for finals to be taken when school resumes in January.

Update 1:30 p.m.: 

The Los Angeles Sheriff's Department says that the temporary lockdown at Diamond Ranch High School in Diamond Bar has been lifted.

"Investigation revealed there was no indication the threat was credible," an alert from LASD says.

"School officials and deputies walked the entire campus, including the classrooms, as a precautionary check and to reassure students and staff."

The sheriff's Special Enforcement Bureau (SEB) "went tot he area as a precaution"-- but left soon thereafter when officials determined there presence wasn't needed.

"At this point of the investigation, there is no specific information that the threat is credible," said Lieutenant Chris Blasnek, Walnut / Diamond Bar Sheriff's Station. "Yet we take all threats seriously and will continue to work closely with school administrators to do all we can to ensure the safety of students and teachers." 

A "phone threat" call was made to the school around 8:45 a.m., according to LASD.  

"It was just a general threat to the school," the Walnut sheriff's station told Patch, adding that there was no specifics as to things like guns.

Update 11:30 a.m.: 

Sheriff's Department Spokesman Mike Parker has tweeted out several messages reassuring the public that no threats have been found.

His latest message, sent at 11:25 a.m., indicates that Diamond Bar Sheriff's deputies were walking around the classes at Diamond Ranch, "as [a] precautionary check," and to "reassure students."

What's more, Parker says that the department's Special Enforcement Bureau (SEB) and SWAT team were nearby when the lockdown call was made, so they responded to the scene as well-- but made it into a training exercise.

"LASD SEB SWAT & copter were nearby, heard call, went as precaution & made it training exercise," he tweeted.

Update 11:15 a.m.: 

The school district says the sheriff's department has not found any credible threats at campus, but continue to sweep the area.

"The Los Angeles County Sheriff's responded to the school campus and have found no evidence of any threat thus far," a message from the district reads online.  "However, the Sheriff's have brought up additional resources to aid in sweeping the entire campus and surrounding area."

The school stresses that the "situation remains PRECAUTIONARY at this time."

"Unfortunately many districts throughout the nation this morning have experienced false threats regarding the safety of students," Pomana Unified said.  "Any and all threats will be taken seriously."

Original story as follows:

Diamond Ranch High School, located at 100 Diamond Ranch Drive, was put on lockdown this morning after the Pomona campus reportedly received a threatening phone call from a student.

KTLA reported that the call was made at around 9 a.m.

The Pomona Unified School District has posted the following message on its website:

"The Los Angeles County Sheriff's Department has directed Diamond Ranch High School to be placed in lockdown as a precautionary measure to a matter they are investigating.

"All students are safe in class. Parent's will be notified as soon as the lockdown is lifted."

Lorbeer Middle School also was locked down this morning, with the same statement being posted on the school's website.

But Diamond Ranch and Lorbeer were not the only schools in Southern California dealing with police issues Friday. Increased law enforcement presence was in force at South Pasadena High School as well as La Mirada High School, according to a City News Service report.

According to the report, both schools had received threats over the past week that were being investigated. Though police were unable to verify the threats as credible, there were increased patrols around both campuses Friday.

Vito Spago December 21, 2012 at 06:42 PM
No surprise here. That school is in crime infested Pomona.
Julie December 21, 2012 at 06:49 PM
@spago. What? Have you ever been there or do you isolate in Glendora? Pomona unified is not just in Pomona. One of the easiest schools to safely lock down. No houses or businesses near by. Not worried that my child is there. Probably a dooms day prank.
margie December 21, 2012 at 07:11 PM
I totally agree julie this is a good school in a good area. People shouldn't be so judgmental!!! This can happen anywhere. We should be focusing on the well being of our children!!!
Danny Mac December 21, 2012 at 07:11 PM
Vito, your post gave me cancer. For once, I had actually hoped the Mayan apocalypse had happened.
Vito Spago December 21, 2012 at 07:14 PM
Don't look at me. I did not make the call. Also why do you folks live in Pomona. Didn't you learn that you do not want a Pomona address? I learned that from my parents when I was 5 years old.
Danny Mac December 21, 2012 at 07:16 PM
I live in Diamond Bar, i also went to Diamond Ranch the second year it was open. Please refrain from posting you imbecile.
Arnold Pasigan December 21, 2012 at 07:50 PM
If you don't have anything nice to say please don't say anything at all and just keep it to yourself or didn't your parents tell you that when you moved?
j garibay December 21, 2012 at 07:55 PM
Vito. My son goes to that school. It's closer to Chino Hills than Pomona. Check out the demographics of that area before you speak. Perhaps you won't sound so ignorant. We are sitting here on pins and needles and you post such a comment? Wow!
j garibay December 21, 2012 at 08:01 PM
I don't know where this "Vito" person lives, but I'd gather to say that Diamond Ranch outperforms his schools. So for him to make such a statement, again, without first looking at the demographics in the area is just a sign of the times. People understand that spewing hatred catches our attention. Normally I don't respond to people like this, but in this situation, I just felt is was beyond bad taste.
Danny Mac December 21, 2012 at 08:11 PM
Be quiet. Nobody is even talking to you douche.
Vito Spago December 21, 2012 at 08:15 PM
I wouldn't worry. I'm sure the police are there now. Also California has always had an 'assault' weapons ban and I am sure there is a 'gun free zone' sign at the school. No fears. True solution to gun violence is to place an armed security guard at every school. Let's see how long it takes for the WDUSD or RUSD or PVUSD to implement. Bet they do NOTHING. Very telling where their priorities are, right?
Yvonne December 21, 2012 at 08:34 PM
Good or bad area Children that are in danger should be a priority! No person is better than another.
Nadia December 22, 2012 at 01:13 AM
Wow...I've never seen so many people insulted about being associated with Pomona. Pomona is a bad area, but I do hope the students in Pomona read this so they can prove all of you wrong with your associations.
Robert Paulson December 22, 2012 at 02:14 AM
Vito, you are wrong! The school sits in Diamond Bar city limits, that's why the Sheriff's Department responded to the school and NOT POMONA PD. The school is part of the Pomona School District. One would think that the school is in Pomona because of it's close proximity to Phillips Ranch, which is a fancy name for POMONA...but I wonder why they designed that school to look so much like a prison?
Julia Nelson December 22, 2012 at 09:22 AM
Kids on the northeast end of Diamond Bar and Phillips Ranch go to Diamond Ranch. It sends kids to the Ivy League and ranks as one of the top high schools in the country. It's on a hilly slice of land that was almost impossible to build on. The architect won a national award for the design. It's been in several commercials and movies. I think it's in county territory under the sphere of influence of Pomona. Not all of Pomona is gang territory.
The Real Deal December 24, 2012 at 02:03 AM
Vito. You're such an ass! You always make such racist, ignorant, and inappropriate comments about things you know nothing about! Sounds like you need to hurry up and sell your property in Walnut and move your butt to Wyoming or something. Just uproot your parents and take them with you. Afterall, with your attitude you might die before they do!
The Real Deal December 24, 2012 at 02:18 AM
Nadia not all of Pomona is bad. I agree, much of the city is in peril and has some deep issues, but most large cities do. My son attends Diamond Ranch HS and is an excellent student who excels academically. It's a shame when people are such followers and don't do their homework before making comments. Many of the problems with students come from parenting and as we all know, there are problem students everywhere. I've heard about the stabbings at Diamond Bar with the rival Asian gangs, something that has never happened since my son has been at DR. The problem is that most people that are not associated with our community (Phillips Ranch/North DB) make generalizations about things they personally have not affiliation with. I ALWAYS take the time to do my own research about something before making a comment or judgement about it.
The Real Deal December 24, 2012 at 02:20 AM
Robert the school was actually not made to look like a prison, but was designed by a well renowned architect who received many honors for his design. I agree, I don't personally care for the look, but it's very modern architecture that is representative of many of the new schools design. In fact, they are always filming commercials and other television shows there.
The Real Deal December 24, 2012 at 02:21 AM
Thanks for setting it straight Julia!
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