A midair collision between an Army helicopter and an American Airlines flight from Kansas killed all 67 people aboard the two aircraft, officials said Thursday, as they scrutinized the actions of the military pilot after the country's worst aviation disaster in a generation.

At least 28 bodies were pulled from the icy waters of the Potomac River after the helicopter apparently flew into the path of the jet late Wednesday while it was landing at Ronald Reagan National Airport near Washington, officials said. The plane carried 60 passengers and four crew. Three soldiers were aboard the helicopter.

“We are now at the point where we are switching from a rescue operation to a recovery operation," said John Donnelly, the fire chief in the nation’s capital.

The plane was found upside-down in three sections in waist-deep water, and first responders were searching an area of the Potomac as far south as the Woodrow Wilson Bridge, roughly 3 miles (4.8 kilometers) south of the airport, Donnelly said. The helicopter wreckage was also found. Images from the river showed boats around the partly submerged wing and the mangled wreckage of the plane’s fuselage.

The collision is the deadliest U.S. air crash since 2001.

There was no immediate word on the cause of the collision, but officials said flight conditions were clear as the jet arrived from Wichita, Kansas, with U.S. and Russian figure skaters and others aboard.

“On final approach into Reagan National, it collided with a military aircraft on an otherwise normal approach," American Airlines CEO Robert Isom said.

A top Army aviation official said the Black Hawk crew was “very experienced” and familiar with the congested flying that occurs daily around Washington.

“Both pilots had flown this specific route before, at night. This wasn’t something new to either one of them,” said Jonathan Koziol, chief of staff for Army aviation. “Even the crew chief in the back has been in the unit for a very long time, very familiar with the area, very familiar with the routing structure.”

The helicopter's maximum allowed altitude at the time of the crash was 200 feet above ground, Koziol said. Defense Secretary Pete Hegseth has said that elevation seemed to be a factor in the collision.

But Koziol said investigators need to analyze the flight data before making conclusions about altitude.

“Both aircraft will have recorders on board that will give us all of that information once we recover it, to give us the real truth on what those aircraft were doing. Up until now, it would just be speculation,” he said.

Inside Reagan National Airport, the mood was somber Thursday morning as stranded passengers waited for flights to resume, sidestepping camera crews and staring out the terminal’s windows at the Potomac, where recovery efforts were barely visible in the distance.

Aster Andemicael had been at the airport since Wednesday evening with her elderly father, who was flying to Indiana to visit family. She spent much of the long night thinking about the victims and their families.

“I’ve been crying since yesterday,” she said, her voice cracking. “This is devastating.”

Flights resumed at the airport around midday. But many flights had been canceled, and airport information boards were covered in red cancellation messages.

Transportation Secretary Sean Duffy, who was sworn in earlier this week, said there were "early indicators of what happened,” though he declined to elaborate pending an investigation.

It is not unusual to have a military aircraft flying the river and an aircraft landing at the airport, he said, but added that he believed the crash could have been avoided.

“From what I’ve seen so far, do I think this was preventable? Absolutely.” he said.

The FAA said the midair crash occurred before 9 p.m. EST in some of the most tightly controlled and monitored airspace in the world, just over 3 miles south of the White House and the Capitol.

American Airlines Flight 5342 was inbound to Reagan National at an altitude of about 400 feet (122 meters) and a speed of about 140 mph (225 kph) when it rapidly lost altitude over the Potomac, according to data from its radio transponder. The Canadian-made Bombardier CRJ-700 twin-engine jet, manufactured in 2004, can be configured to carry up to 70 passengers.

The twin-engine aircraft comes in several versions capable of seating up to about 70 passengers.

A few minutes before landing, air traffic controllers asked the arriving commercial jet if it could land on the shorter Runway 33 at Reagan National, and the pilots said they were able. Controllers then cleared the plane to land on Runway 33. Flight-tracking sites showed the plane adjust its approach to the new runway.

Less than 30 seconds before the crash, an air traffic controller asked the helicopter if it had the arriving plane in sight. The controller made another radio call to the helicopter moments later: “PAT 25, pass behind the CRJ.” Seconds after that, the two aircraft collided.

The plane’s transponder stopped transmitting about 2,400 feet (732 meters) short of the runway, roughly over the middle of the river.