Updated at 11:44 p.m.

University Police Department officers are allowing students back into Gelman Library following a report earlier this evening that a suspect that was seen with a handgun was later seen in the library.

“We had a report of a possible suspect meeting the description inside the library and police are checking out the report,” University spokeswoman Candace Smith said.

“A student called in a possible suspect at the Gelman Library who was changing clothes.  Law enforcement units from U.S. Park Police, [the Metropolitan Police Department] and [the U.S. Secret Service] searched the library and no suspects were located. The library is reopening now,” a 11:30 p.m. alert said.

Officers pushed students out of range of the building, so H Street between 21 and 22 streets were clear. One University police officer told students to “get inside, and get inside now,” directing them into the Marvin Center.

Secret Service was on scene, according to media outlets.

The Secret Service reported that a man with a handgun was running away from the White House and potentially toward campus, according to a GW Alert sent at 9:32 p.m. Multiple enforcement agencies have searched the campus area and did not find the suspect, according to a new alert sent at 10:20 p.m.

Smith said earlier that the Secret Service, UPD and MPD are investigating the threat.

The man is described as a “white male with a handgun, balding, possibly wearing eye glasses [and] wearing a gray fleece sweater,” according to the alert.

The suspect came from the area of the White House and was heading west toward campus, UPD Chief Kevin Hay said.

The Secret Service and the Metropolitan Police Department did not have immediate updates.