BATON ROUGE, La. -

Louisiana State University has reopened and classes scheduled for Sept. 18 will be held as planned.

The campus was evacuated Monday because of a bomb threat.

LSU posted a notice on its website and Twitter account at about noon asking students, faculty and staff at its Baton Rouge campus to "please evacuate as calmly and quickly as possible."

According to The Advocate, a newspaper in Baton Rouge, LSU Police were investigating the threat that was called into the East Baton Rouge Parish 9-1-1 call center around 10:32 a.m.

The newspaper reported that traffic in the central part of the campus was at a standstill at 12:30 p.m.

Capt. Doug Cain of the Louisiana State Police said state police bomb technicians were at the scene. Cain said police are talking to their counterparts in states where university bomb threats were reported last week to determine whether there are similarities.

The bomb threat comes just a few days after the University of Texas and North Dakota State University were evacuated because of bomb threats on Friday. Both of those threats turned out to be false.

LSU has roughly 29,000 students and 3,000 faculty and staff.

"Monday ... is a very big class day, so I think the majority of that group was probably on campus at the time," university spokeswoman Kristine Calongne said.

Calongne said she doesn't know of any other time the entire flagship university campus was evacuated.

"I've been at LSU since 1990 -- if you count my student years -- and I don't ever recall us having an evacuation of the whole campus," she said.

Catherine Lacoste, an 18-year-old freshman and architecture major, said she received notification of the bomb threat through the emergency text message system while working in a studio on a project. She double-checked the information and then evacuated. She didn't seem worried about the threat, however.

"I'm going to go home, take a nap and hopefully campus will be open again when I wake up," Lacoste said.

About 2:15 p.m., the university canceled classes for the rest of the day.