A gunman opened fire Wednesday morning on a baseball practice at a park in Alexandria, Virginia, involving Republican members of Congress, possibly injuring several including at least one lawmaker, Steve Scalise, the majority whip, according to police and a congressman.

Alexandria police would only confirm that a shooting had occurred and that one person was in custody.

Rep. Peter Kane, R-N.Y., in an interview with The Washington Post, confirmed early details. He said Capitol Police confirmed the account to him.

Rep. Devin Nunes, R-Calif., told The Post that Capitol Police officers walked into the congressional gym around 7:30 a.m. Wednesday and told members about the shooting and said Scalise had been shot.

White House spokesman Sean Spicer tweeted: “Both @POTUS & @VP are aware of the developing situation in Virginia. Our thoughts and prayers are with all affected.”

Rep. Mo Brooks, R-Ala., tweeted that “Shooter attacked a GOP baseball practice. Rifle. 50+ shots fired. 5 hit including Steve Scalise. I am not shot.”