Shocking: Member of U.S. congress Steve Scalise shot at Alexandria, Virginia.

A member of US congress Rep. Steve Scalise was shot Wednesday morning in Alexandria, Virginia, a House colleague told CNN, in what sources are calling an apparent "deliberate attack."

The shooting took place at a practice for the GOP congressional baseball team. Scalise, a member of the House Republican leadership as the majority whip, appeared to have been shot in the hip and it appeared two Capitol Hill police agents were shot, according to Rep. Mo Brooks, who told CNN he was on deck when the shooting occurred.

According to both congressional and law enforcement sources, the shooting appears to be a "deliberate attack."

Two law enforcement sources told CNN the shooter, who is in police custody, has been taken to a hospital.

Kentucky Sen. Rand Paul, who was at the practice, told CNN "it would have been a massacre" had Capitol Police not been present.

"Nobody would have survived without the Capitol Hill police," Paul said on CNN. "It would have been a massacre without them." Arizona Sen. Jeff Flake added that he saw a member of Scalise's security detail return fire on the gunman for what felt like 10 minutes, even though the police officer was wounded in the leg.

"50 (shots) would be an understatement, I'm quite sure," Flake said when asked about the total amount of gunfire, including police returning fire.

Flake said two members of Scalise's security detail were wounded, and another man was wounded in the chest.

Once they were able, Flake said he and Rep. Brad Wenstrup, who is a physician, went out to where Scalise was lying after dragging himself away from the shooting to apply pressure to the wound. Scalise was coherent the whole time, Flake said.

Source: CNN