President Joe Bidensaid in a statement that he and his wife were heartbroken to learn of the attack and expressed condolences to Evans' family.
One of the officers hit by the driver who rammed into a US Capitol barricade has died.
The Capitol Building was placed on lockdown Friday after a knife-wielding suspect who has since died in the hospital - identified as 25-year-old Noah Green - rammed his auto into the North barricade, killing Evans and injuring another Capitol officer. He also said he was unemployed after leaving his job, "partly due to afflictions", and praised Nation of Islam leader Louis Farrakhan.
The danger on Friday was limited as Congress was in recess and relatively few people were in the building. United States spy agencies warned in mid-March of an ongoing threat that racially motivated violent extremists, such as white supremacists, will carry out mass-casualty attacks on civilians while militia groups target police and government personnel and buildings. He directed flags at the White House to be lowered to half staff.
Five people died in the January 6 riot, including Capitol Police officer Brian Sicknick, who was among a badly outnumbered force trying to fight off the intruders seeking to overturn the election.
The FBI said in a statement its Washington Field Office is responding and providing support to Capitol Police.
A photo taken by an Associated Press photographer showed officers surrounding a vehicle that appeared to have crashed into a barricade on the Capitol's north side.
But Washington Metropolitan Police Chief Robert Contee indicated that a terror link was not suspected at this stage.
The incident comes almost three months after the deadly 6 January riot at the Capitol.
Both the U.S. Senate and House of Representatives were not in session Friday.
"Another tragic day at the Capitol", tweeted Rep. Nydia Velazquez (D-N.Y.). 'And I know members are taking it very, very seriously, but today was another blow for the Capitol Hill family'. "The men and women of Capitol Police are defenders of our democracy and heroes to us all".
On March 24, Capitol Police announced that an outer perimeter topped by concertina wire had been taken down, but an inner perimeter fence immediately around the Capitol building was still in place.
At the time Trump's supporters shouted slogans including "Stop the Steal" and "Hang Mike Pence" as they attacked the Capitol and said they hoped to stop the election certification. USCP later corrected the announcement, clarifying that the vehicle incident occurred on Constitution Avenue, not Independence Avenue.
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That crash was the island's worst since 1991, when 30 passengers were killed and 112 injured after two trains collided in Miaoli. March 8, 1981: A train hit a truck near Hsinchu on a level crossing, killing the truck driver and 30 passengers on the train.
Fully vaccinated can travel again, says new CDC guidance
Plus, almost all worldwide US air visitors still need to get a negative Covid-19 test before traveling to the United States. A person is considered fully vaccinated two weeks after receiving the last recommended dose of vaccine, the CDC said.