Several people were feared killed today in a shooting at the building that houses the Capital Gazette, a daily newspaper published in Annapolis. Also Read - Three Dead in Maryland Shooting, Several Injured; Lone Suspect in Custody

A reporter for the Capital Gazette, Phil Davis, tweeted that a “gunman shot through the glass door to the office and opened fire on multiple employees.” He said several people were killed.

“There is nothing more terrifying than hearing multiple people get shot while you’re under your desk and then hear the gunman reload,” Davis said.

Up to four people had been killed, according to CBS News quoting two sources.

The Baltimore Sun, which owns The Capital newspaper in Annapolis says a reporter told them of the shooting Thursday afternoon.

The federal Bureau of Alcohol, Tobacco, Firearms and Explosives said it was responding to reports of the shooting.

The local police confirmed on Twitter that the building has been evacuated, but officers continued the search it in the immediate aftermath of the shooting.

Anne Arundel County Police Department spokesman Marc Limansky said officers are searching the building where the shooting was reported. He said the situation is “active and ongoing.”

On several TV reports, people could be seen evacuating the premises with their hands raised, as police officers urged them to depart through a parking lot and officers converged on the building.

Lt. Ryan Frashure, another spokesman for Anne Arundel County police, said on WJLA that officers are “doing everything to get people out safe.” He said they must look for other dangers, such as bombs and other shooters.