The counting of Electoral College votes came to an abrupt halt on Wednesday after protesters, after being encouraged by President Trump who said he would "walk down" with them, breached the U.S. Capitol Building.

While the building was called into on lockdown, one protester reached the Senate floor dais. Photos appear to show an armed standoff at the door of the House of Representatives.

A source familiar tells ABC News House Speaker Nancy Pelosi has requested the National Guard to help to secure the Capitol.

Here are images of what’s unfolding:

There’s been an armed standoff at the front door of the House of Representatives and security officers drew their guns drawn at someone who is trying to breach the door, according to a pool reporter in the House chamber.

Another pool reporter on Capitol Hill said he observed protestors breach the Senate chamber. Senators were evacuated earlier, per sources.

One man stood up on the Senate dais and said, "Trump won that election," according to the pool reporter, who also observed protests stalking the halls, appearing to look for senators.

Several dozen protesters were heard yelling, "Where are they?"

Capitol Police were asking for additional law enforcement assistance as protests intensify.

-ABC News' Trish Turner

Lawmakers were being evacuated rom the House floor after protesters began banging on door, according to a pool reporter in the House gallery.

Moments earlier, an officer told lawmakers they may need to duck under their chairs as protests escalated inside of the building.

"We now have individuals that have breached the Capitol building. They are in the Rotunda area," the dispatch said.

Lawmakers still in the gallery were told to "be prepared" to relocate to cloakrooms.

Rep. Steve Cohen, D-Tenn., screamed from the gallery, "Call Trump! Call your friend!"

Rep. Jim Himes, D-Conn., tweeted, "Police have asked us to get gas masks out as there has been tear gas used in the Rotunda."

Trump finally broke his silence, after about an hour of protests, but did not call for the protesters to go home but to "Stay peaceful!"

Sen. Chuck Grassley interrupted the proceedings, taking over for Vice President Mike Pence to preside over the Senate -- calling the Senate into recess subject to the call of the chair as protesters breached the inside of the U.S. Capitol building.

Pence appeared to have been moved out of the Senate chamber. The House of Representatives was being evacuated.

Former Republican New Jersey Gov. Chris Christie called on President Donald Trump to ask protesters to leave the Capitol grounds on ABC News Live.

"It’s pretty simple," he said. "The President caused this protest to occur. He's the only one who can make it stop."

"What the vice president just said is not good enough, what the president said is not good enough," Christie added. "The President has to come out and tell his supporters to leave the Capitol grounds, and to allow the Congress to do their business peacefully. Anything short of that is an abrogation of his responsibility."

Christie noted that both Trump and his son Donald Trump Jr. had previously spoken to the crowd.

"I don't know that they anticipated this was going to be the result," he said. "But it doesn't matter whether they did or they didn’t. This is the result of their words."