(Reuters) – A gunman fired through a glass door at a newspaper in the Maryland capital of Annapolis and sprayed the newsroom with bullets on Thursday, killing at least four people and injuring several others, news reports said.

The suspect has been apprehended and no motive is known for the attack at the Capital Gazette newspaper, local news reports said.

For now, the Annapolis shooting is being treated as a local incident and not one that involves terrorism, a law enforcement official said. The Federal Bureau of Investigation is on the scene assisting local authorities, the official said.

Phil Davis, who identified himself as a courts and crime reporter at the Capital Gazette, tweeted that multiple people had been shot.

Davis said a single shooter “shot multiple people at my office, some of whom are dead.”

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

President Donald Trump has been briefed on the shooting, White House spokeswoman Lindsay Walters said.

“Our thoughts and prayers are with all that are affected,” she said. Trump was aboard Air Force One, returning to Washington from an event in Wisconsin.

Agents from the Baltimore office of the Bureau of Alcohol, Tobacco, Firearms and Explosives were responding to the incident, the bureau tweeted.

Live video images showed people leaving the building, walking through a parking lot with their hands in the air. Scores of police vehicles were on the scene.

Police also went to the offices of the Baltimore Sun as a precaution, that paper reported.

(Writing by Jon Herskovitz; Additional repeorting by Mark Hosenball and Jeff Mason in Washington, DC, Colleen Jenkins in North Carolina; Editing by Daniel Wallis, Phil Berlowitz and Richard Chang)