Several lawmakers tweeted prayers for the victims of Monday's shooting at Washington, D.C.’s Navy Yard. [WATCH VIDEO]

At least 12 were killed and eight others were wounded at and around the Naval Sea Systems Command Headquarters, according to local law enforcement.

Senate Majority Leader Harry ReidHarry Mason ReidWATCH: There is no Trump-Russia collusion and the media should stop pushing this The demise of debate in Congress ‘North by Northwest,’ the Carter Page remake MORE (D-Nev.) announced on the Senate floor that the upper chamber would adjourn until Tuesday morning because of the shooting. 



Rep. Steve WomackStephen (Steve) Allen WomackCiting deficits, House GOP to take aim at entitlements Dems tee off on Trump budget House presses Senate GOP on filibuster reform MORE (R-Ark.), who was a colonel in the Army National Guard, was the first to tweet about it at 8:12 a.m.



"Many of those who serve there in military and civilian roles live in my district, and while we do not yet know all the details about who carried out this terrible shooting, there is no doubt that it has shaken the Navy, the greater Washington D.C. community, and our nation as a whole," said Steny Hoyer, House Democratic Whip, in a statement Monday afternoon.

There were conflicting reports Monday morning about whether more than one shooter was involved.

"It is sad and tragic that we once again find ourselves trying to grapple with another mass shooting," Rep. Chellie Pingree (D-Maine) said in a statement. "My thoughts and prayers are with the victims, their families and the survivors. This tragic and senseless loss of life is only made worse by the fact that it appears at least some of the victims were serving the country in uniform."

The shooting was first reported at 8:20 a.m.

Rep. Jack Kingston (R-Ga.), tweeted around 9:40 a.m. that he hoped the shooter would be captured quickly.



An hour or so later, multiple reports said police had cornered the suspect in the building. The Associated Press reported shortly after 11:30 a.m. that a federal law enforcement official said a shooter had died.

House Minority Leader Nancy Pelosi (D-Calif.) said on Twitter her prayers are with the victims and their families.



House Speaker John BoehnerJohn Andrew BoehnerRestoring fiscal sanity requires bipartisan courage GOP congressman slams primary rival for Ryan donations Speculation swirls about Kevin McCarthy’s future MORE (R-Ohio), echoed Pelosi's statement in a tweet.


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Some lawmakers may have been traveling back to Washington Monday morning from their home districts where they frequently spend weekends. Both the House and Senate chambers reconvene at 2 p.m.

Rep. Martha RobyMartha Dubina RobyFormer Moore campaign manager to challenge GOP rep in Alabama Brooks’s prior attacks on Trump could hurt in Alabama Senate race How the GOP came to dominate, and be dominated by, rural voters MORE (R-Ala.) tweeted all of her congressional staff have been accounted for, and are safe.



Other members tweeted similar sentiments.







Sen. Pat Toomey (R-Pa.), tweeted that he prayed for the safe evacuation of the Navy Yard area and for first responders. About 3,000 people work in the building complex where the shooting took place.



Sen. Kelly AyotteKelly Ann AyotteAudit finds US Defense Department wasted hundreds of millions of taxpayer dollars US sends A-10 squadron to Afghanistan for first time in three years No, the US did not spend million on a gas station in Afghanistan MORE (R-N.H.), said via Twitter that she was "deeply saddened" by the tragedy.


Rep. Pete GallegoPete Pena GallegoTexas Democrats smell blood in the water for 2018 ObamaCare repeal vote: 15 GOP lawmakers to watch Vulnerable Texas GOP lawmaker survives rematch MORE (D-Texas), commented on the violence via Twitter.



None of the lawmakers who tweeted made any comments regarding gun control.

Many more have been sending their prayers via social media.

This story was updated at 4:09 p.m. It was last updated at 2:18 p.m.