"We are now at the point where we are switching from a rescue operation to a recovery operation," John Donnelly, the fire chief in the nation's capital. "We don't believe there are any survivors."
The body of the plane was found upside down in three sections in waist-deep water. The wreckage of the helicopter was also found. Donnelly said first responders on Thursday were searching an area of the Potomac River as far south as the Woodrow Wilson Bridge, roughly 3 miles (4.8 kilometers) south of the airport.
"We have early indications of what happened here," Transportation Secretary Sean Duffy said at a Thursday morning news conference, expressing confidence that American airspace remains the safest in the world.
There was no immediate word on the cause of the collision, but officials said flight conditions were clear as the jet coming from Wichita, Kansas, with U.S. and Russian figure skaters and others aboard, was making a routine landing when the helicopter flew into its path.