University Hall, Indiana University-Purdue University Indianapolis. (Photo by Liz Kaye, IU Communications)

After an armed robbery near campus at IUPUI in Indianapolis, college officials warned the campus community to take shelter Tuesday afternoon as the suspect was running toward campus.

At about 4:30 p.m., another alert announced that areas nearby had been searched by police and the lockdown was lifted but that an increased police presence would continue. The suspect had not been found.

An Indiana University-Purdue University Indianapolis alert warned Tuesday afternoon: “A subject with a Gun has been reported running toward the IUPUI campus from the 700 Blk of Blake St. If you are on campus, trust your instincts and take safe shelter in the nearest available room. Lock the door if possible. Remain in place until the police or a campus administrator known to you gives the ALL CLEAR. Call 911 if you have information about the armed person. If you are not on campus, stay away. Follow instructions from university officials or local authorities. For available information and updates on this incident visit emergency.iu.edu”.

There were no injuries in the robbery, according to social media posts from university officials.

The alert came on a day when all public schools in Los Angeles shut down after threats of explosions and shootings with assault rifles were emailed to several school board members.

[All Los Angeles schools closed over threat to ‘many’ schools]

And it was the latest college campus to lock down in recent weeks over threats or fear of violence. After a mass shooting at an Oregon community college earlier this fall and intense protests at many campuses, tensions have escalated and many college officials are quick to take the safest possible option, warning students early and often. Eastern Kentucky University and Western Washington University shut down earlier this fall after threats were made, and San Bernardino Valley College shut down Monday night and Tuesday after a bomb threat was called in.

[College in San Bernardino cleared to reopen Wednesday]

[Eastern Kentucky University shuts down over threat]

IUPUI, a public research university created from a merger of the Indianapolis campuses and programs of Indiana University and Purdue University, offering more than 200 degree programs from Indiana and Purdue, has about 30,000 students.