Washington DC

The man, identified as Floyd Ray Roseberry, 49, surrendered hours after the threat was made.

US Capitol Police had been negotiating with the driver who had parked a pick-up truck near the Library of Congress, across the street from the Capitol building and Supreme Court.

His motives remain unknown. Police are still searching the vehicle.

Congress is currently in recess, but some staff are working in the Capitol. Several office buildings were evacuated.

The announcement comes after protesters rushed up the steps of the U.S. Capitol as Congress debated the presidential vote count. 

“Today what we witnessed was riotous and unlawful behavior,” Metropolitan Police Department Chief Robert Contee said.

NBC reports the curfew will be in effect until 6 a.m. Thursday. 

“I continue to urge all Washingtonians to stay home and stay calm, and if you see something, say something,” Bowser said in an address to the city. “But above all, stay home."

Up to 10 members of MS-13 communicated on walkie talkies as they closed in on their victim at a recreational area in Wheaton, Maryland, say officials.

The victim's "heart had been excised from his chest and thrown into the grave", according to court records.

US President Donald Trump has vowed to wipe out MS-13.

One of the suspects, 19-year-old Miguel Angel Lopez-Abrego, appeared in court on Wednesday, according to Montgomery Community Media.

He has been charged with first-degree murder and remanded in custody.