Five people have been killed and many more wounded after a gunman opened fire at the Capital Gazette newspaper building in Maryland.

Staff at the newspaper in Annapolis said he shot through a glass door into the newsroom.

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

Police announced that a suspect was now in custody and was being questioned.

“We’ve had a terrible shooting incident here this afternoon,” county executive Steve Schuh said in a news conference.

“There are several people who have died from this incident.”

Image source Youtube/CBSN

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Police could not identify the exact weapon at the time. They said the suspect was being interrogated by law enforcement.

Several federal agencies, including the FBI, were involved in responding to the shooting in the city of Annapolis, just east of Washington DC.

Maryland Governor Larry Hogan said on Twitter he was “absolutely devastated” and was in contact with authorities.

President Donald Trump was briefed on the shooting.

He tweeted: “Prior to departing Wisconsin, I was briefed on the shooting at Capital Gazette in Annapolis, Maryland. My thoughts and prayers are with the victims and their families. Thank you to all of the First Responders who are currently on the scene.”

The Bureau of Alcohol, Tobacco, Firearms and Explosives said it was responding.

The Capital Gazette is a daily newspaper and digital news site that is a part of Capital Gazette Communications.

Capital Gazette Communications publishes several local papers and is owned by the Baltimore Sun Media Group.