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 ReidOPINION | 5 ways Democrats can win back power in the states THE MEMO: Trump's base cheers attacks on McConnell It's time for McConnell to fight with Trump instead of against him MORE (D-Nev.) announced on the Senate floor that the upper chamber would adjourn until Tuesday morning because of the shooting. 



Rep. Steve WomackSteve WomackJockeying begins in race for House Budget gavel Trump reopens fight on internet sales tax Labor chief says he can't snap his fingers and undo Obama rule 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 BoehnerIt's time for McConnell to fight with Trump instead of against him How Republicans can bring order out of the GOP's chaos Republican donor sues GOP for fraud over ObamaCare repeal failure 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 RobyBrooks’s prior attacks on Trump could hurt in Alabama Senate race How the GOP came to dominate, and be dominated by, rural voters House GOP not sold on Ryan’s tax reform plan 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 AyotteRNC chair warns: Republicans who refused to back Trump offer 'cautionary tale' OPINION: Democracy will send ISIS to the same grave as communism Kelly Ayotte joins defense contractor's board of directors MORE (R-N.H.), said via Twitter that she was "deeply saddened" by the tragedy.


Rep. Pete GallegoPete P. GallegoObamaCare repeal vote: 15 GOP lawmakers to watch Vulnerable Texas GOP lawmaker survives rematch 5 races for tech to watch 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.