UPDATE: Classes Resume at Citrus College

GLENDORA (CNS/KNX 1070) - Classes will resume Wednesday morning at Citrus College, after the school was locked down due to a phoned-in threat. 

Glendora police received a call Tuesday from a man threatening to shoot up the school. 

Nearby Azusa Pacific University was also placed on lockdown for several hours as a precaution. 

A 30-year-old Chino man, who took classes online at Citrus, was taken into custody.  

 The lockdown was lifted on Azusa Pacific University's campus Tuesday. Staff and students no longer need to shelter in place. 

Glendora police reported that a person was detained at Citrus College, but the campus is still on lockdown, and police are asking the public to continue to stay away from campus.

An unknown type of threat prompted a lockdown and police search of Citrus College in Glendora today, while nearby Azusa Pacific University also went on lockdown as a precaution.

The investigation began late Tuesday morning with "a threat at Citrus College," according to the Glendora Police Department.

Officials at Citrus College placed the campus on lockdown, and tweeted that the incident was "not a drill." University officials urged people to stay clear of the campus, and advised those already on campus to turn off lights, lock doors and remain quiet.

Citrus College is still on lock down. We have officers actively investigating on scene. We will be posting periodic updates on Twitter. All updates from GPD will come from there. Do not go to Citrus College. Twitter: @glendora_pd

The nature of the threat was unclear. KCAL9/CBS2 reported that the threat had been phoned into the campus.

In response to the Citrus College situation, nearby Azusa Pacific University also was placed on lockdown and university officials urged people on that campus to shelter in place.

The lockdowns were continuing early Tuesday afternoon, and Glendora police urged people to stay away from the area.

URGENT: APU Community at the Azusa campus: Please shelter-in-place. The campus is on lockdown. If you are on campus, please remain where you are. If off campus, please stay away from the area. Glendora PD is investigating a threat at Citrus College. Updates to follow.

Citrus Alert: on 1/15/18 an order has been issued to lock down Citrus College. If you are not on campus, stay away. Go to the nearest room, turn off lights, lock door, and remain quiet. Remain locked down until an All Clear has been issued.