A report from White House says, US top Republican was among five people who were shot and wounded by a gunman during baseball practice in Virginia.
US House of Representatives Majority Whip Steve Scalise was hit, eye witnesses said.
Washington DC police department said they are now investigating a "multiple shooting" and a suspect was in custody.
The lawmakers were practising for a game between Democrats and Republicans.
The annual congressional ballgame was scheduled to be played on Thursday at Nationals Park, home of Major League Baseball franchise the Washington Nationals, BBC report said.