They are all believed to be employees of the newspaper.
In Baltimore, New York City and Los Angeles, law enforcement has deployed officers to protect major media organizations as a precaution. He carried no ID and has refused to identify himself.
Police said they could not identify the exact weapon at the time. We have members of the bomb squad on scene. He said his "thoughts and prayers are with the victims and their families" and thanked first responders. "We don't anticipate having any more explosive devices".
Acting police Chief William Krampf said the building has been secured.
Police described the suspect - who was being questioned in custody - as a white adult male who was armed with a rifle or a shotgun, and appeared to have acted alone.
He credited active shooter training for the quick response.
During the shooting, intern Anthony Messenger tweeted a plea for help.
Four people are feared to have been killed and a further 20 injured after a gunman opened fire at a newspaper office.
"There is nothing more terrifying than hearing multiple people get shot while you're under your desk and then hear the gunman reload".
Gov. Larry Hogan, on Twitter, wrote, "Absolutely devastated to learn of this tragedy in Annapolis".
Sources tell CBS News five other people were injured. One patient is being treated at the University of Maryland Medical Center, a spokesperson confirmed.
A former South Jersey reporter who covers crime for a Maryland newspaper described a horrific scene that unfolded when a gunman opened fire in his newsroom Thursday, leaving five people dead.
Special Agents and Task Force Officers are reportedly assisting the Anne Arundel Police with their investigation.
He then went on saying in a series of tweets, "There is nothing more terrifying than hearing multiple people get shot while you're under your desk and then hear the gunman reload." a few minutes later, when the police intervened, the reporter said, "I'm now waiting to be interviewed by police, so I'm safe and no longer at the office". "I don't know why he stopped", said Davis.
"I don't know why".
"We have injuries. I can't give the extent of those injuries at this point", Anne Arundel Police Lt. Frazier said in a press briefing.
Police respond to a shooting in Annapolis, Maryland, June 28, 2018.
President Donald Trump was briefed on the shooting shortly after reports emerged, an aide confirmed. A law enforcement source the suspect initially refused to cooperate. The official said the gunman was not co-operating with investigators.
At the White House, spokeswoman Lindsay Walters said: "There is no room for violence, and we stick by that".
The Bureau of Alcohol, Tobacco, Firearms and Explosives said it was responding.
Belgium now have three yellow cards to England's two, meaning this could be a battle of discipline more than anything. Wins or draws for Brazil against Serbia and Switzerland against Costa Rica will send both through.
But the volume of condemnation on breaking up families, from inside and outside the White House, finally overwhelmed Trump. Instinctively combative and fond of chaos, Trump usually digs in on controversial policies, rather than backing down.
Brendon Hartley will start the race from last place after Toro Rosso had to change his Honda engine on Friday. Red Bull pair Max Verstappen and Daniel Ricciardo posted the fourth- and fifth-fastest times in qualifying.
The first lady, a former fashion model, sometimes gets input on wardrobe decisions from her fashion adviser, Herve Pierre. We dress for funerals, weddings, school, and the beach, and we think about all of it - even the flip-flops.
North Dakota, that dealt with out-of-state taxes collected on catalog purchases, and the 1967 case, National Bellas Hess Inc. v. A Bicycle Retailer retailer survey earlier this year found that 40 percent of retailers who responded do some online sales.
Canada just legalized marijuana nationwide. "A courageous move on the part of the government", he said, according to CBC . Justin Trudeau tweeted that because it's too easy for kids to buy weed, "criminals reap the profits".
Under these circumstances, a minister must make a statement in Parliament within 14 days and give MPs an opportunity to vote. In her own interview broadcast on Sunday the prime minister rejected the idea she had double-crossed her rebels.
Fox and Disney shareholders had been scheduled to vote on Disney's original bid July 10, but that meeting has been postponed. But Comcast has also bid to buy all of Sky at £12.50 ($16.46) a share (higher than Fox's proposal of £10.75 a share).
Fans were filmed celebrating wildly in pubs as England registered their first opening game win in a tournament since 2006. Kane was pushed to ground again after the break, this time by Yassine Meriah, but again nothing was given.
Democrat Joseph Crowley Loses Bid to Latina Socialist Woman
She has never before held political office and ran much of her campaign while working as a bartender at Flats Fix in Union Square. Following Ms Ocasio-Cortez's win, dictionary Merriam-Webster tweeted that socialism emerged as their top search item.
Supreme Court accepts Texas voting maps in blow to Democrats
However, Barronelle Stutzman of Arlene's Flowers is still facing the same limitations on her freedom in Washington state . Congress from election districts that were later struck down by the courts as either racial or partisan gerrymanders.
Apple will upgrade AirPods and release over-head
Thus far, it has mostly worked with Inventec, but builds about 30 percent of the units with Luxshare Precision Industry Co. High-end AirPods, a new HomePod and over-ear headphones are coming as soon as next year, reported Bloomberg .
Actress Cynthia Nixon says son has come out as transgender
She is very well-known for advocating LGBTQ rights, previously stating: "We have to keep organising like our lives depend on it". The pair met in 2001, when the actress was campaigning in order to reduce New York City public school class sizes.
Trump considering 20% tax on U.S. auto imports
He told automakers at a White House meeting in May that he was planning tariffs on some imported vehicles. The United States in 2017 accounted for about 15 percent of worldwide Mercedes-Benz and BMW brand sales.
Fortuitous Costa goal helps Spain overcome stubborn Iran
The Carlos Queiroz's men will be hoping to beat the La Rojo so as to top the group after beating Morocco 1-0 on Friday. It has been a World Cup of unusual bobbles, ricochets and bounces, and this time it was Spain's turn to profit.
England v Australia 3rd ODI 2018 - Highlights
Hales's 92-ball blazing innings, featuring 16 fours and five sixes, ended when he was caught in the deep off Jhye Richardson. The visitors will need to reverse history as only twice have teams breached the 400-run mark whilst batting second in ODIs.
U.S. Expected to Withdraw From UN’s Human Rights Council
National Security Adviser John Bolton, who joined the White House earlier this year, has also consistently opposed the body. Haley has warned the council past year that the United States would withdraw from the council if changes were not made.