Sixty-seven people are presumed dead after a commercial aircraft collided with a military helicopter in Washington, D.C. near Reagan Washington National Airport on Jan. 29.

The midair collision between the American Airlines passenger jet and Black Hawk military helicopter occurred shortly before 9 p.m. over the Potomac River, where salvage operations continue.

So far, the remains of 41 people have been recovered, though officials said they expect all the victims to be found. The American Eagle aircraft and the Army Black Hawk remain in the Potomac River.

The Federal Aviation Administration has since issued new flight restrictions for helicopters in the Washington, D.C. area, as well as for Reagan National Airport.

The FAA, the U.S. Army and the National Transportation Safety Board are investigating the cause of the crash. Investigators with the National Transportation Safety Board confirmed Thursday evening, nearly 24 hours after the collision, that the cockpit voice recorder and flight data recorder from the plane were recovered and are being evaluated.

What aircraft were involved in the crash?

American Eagle flight 5342 was traveling from Wichita, Kansas, to Washington, D.C., and had 60 passengers and four crew members on board, American Airlines said in a statement.

The CRJ-700 aircraft was operated by PSA airlines, which is a wholly owned subsidiary of American Airlines, American Airlines CEO Robert Isom said in a video posted on X on Wednesday evening.

The aircraft appeared to be on approach to Ronald Reagan Washington National Airport when it collided with the military helicopter, Isom said.

“At this point we don’t know why the military aircraft came into the flight of the PSA aircraft,” Isom said during a press conference on Thursday morning.

Ron McLendon II, the Public Affairs Deputy Director for Joint Task Force-National Capital Region/Military District of Washington, said in a statement to NBC News a military helicopter was performing a training mission at the time of the collision.

“While performing a training mission a United States Army UH-60 Blackhawk helicopter from Bravo Company, 12th Aviation Battalion, Davison Army Airfield, Fort Belvoir, Va., collided in midair with an American Airlines Bombardier CRJ700 regional jet Flight 5342 last night at Ronald Reagan Washington National Airport,” he said.

Preliminary indications showed there were three people on board the helicopter at the time of the collision, an Army official told NBC News.

The cause of the crash is still unclear and under investigation. The NTSB is leading the investigation into the cause of the crash.

The NTSB recovered the black box from the Black Hawk helicopter, the agency's board member Todd Inman said in a press conference Jan. 31.

Inman said the NTSB expects a “full extraction” of data from the device.

Two devices were also recovered from the American Airlines plane, Inman said, adding that officials expect a “full download” of information from the jet’s flight data recorder. He noted, however, that the information will not be released immediately after it has been downloaded.

The cockpit voice recorder was recovered as well, he said, but experienced “water intrusion.”

Transportation Secretary Sean Duffy said in a press conference on Thursday morning both the passenger aircraft and military helicopter were in a "standard flight pattern."

“Last night ... this was a clear night. The helicopter was in a standard pattern. If you live in the D.C. area, you’ll see helicopters up and down the river, this flight pattern is seen oftentimes when you live in D.C.,” Duffy said.

“This was not unusual with a military aircraft flying (over) the river and aircraft landing at DCA. And again, if you live in the area, you’ll see that frequently with those two aircraft working together,” he added.

Duffy said “we will not rest until we have answers for the families and for the flying public.”

All 64 passengers and crew members on the American Eagle flight were not expected to have survived the crash, officials said.

Several elite figure skaters were on board at the time of the collision, U.S. Figure Skating said in a statement to NBC News on Wednesday.

“These athletes, coaches, and family members were returning home from the National Development Camp held in conjunction with the U.S. Figure Skating Championships in Wichita, Kansas,” U.S. Figure Skating said. “We are devastated by this unspeakable tragedy and hold the victims’ families closely in our hearts.”

U.S. Figure Skating said it will continue to monitor the situation and will release more information as it becomes available.

The Skating Club of Boston CEO Doug Zeghibe said during a press conference Thursday morning that as many as 14 figure skaters are feared dead after the plane crash.

Six victims were affiliated with the Skating Club of Boston, Zeghibe said. He identified the victims as two coaches, two skaters and their two mothers.

The two teen skaters were Spencer Lane and Jinna Han and their moms, Christine Lane and Jin Han, respectively, according to a Facebook post from the Skating Club of Boston. Vadim Naumov and Evgenia Shishkova were identified as the coaches, according to the post.

Brielle Beyer, a 12-year-old skater from Virginia, and her mother, Justyna Magdalena Beyer, were also on the flight, Madalena Beyer's sister confirmed to NBC News.

“It’s a major loss for our skating community,” Zeghibe said.

Sarah Hirshland, CEO of the U.S. Olympic & Paralympic Committee, said in a statement posted on X that the committee was "devastated" and that there were "no words to capture the depth of our sorrow."

“Among those lost were talented athletes, dedicated coaches, and beloved family members from the U.S. Figure Skating community, all returning home from the National Development Camp,” Hirshland said. “These Olympic hopefuls represented the bright future of Team USA, embodying the very essence of what it means to represent our country — perseverance, resilience, and hope.”

“They were remarkable young people and talents, passionately pursuing their dreams, and they will forever hold a cherished place in the Team USA family,” she added.

Russian figure skating world champions Evgenia Shishkova and Vadim Naumov, and Inna Volyanskaya were among those who died in the crash, the Russian embassy said Jan. 31.

“The U.S. Department of State has officially confirmed that our compatriots were among the passengers in the plane crash,” the embassy said in a statement.

Ian Epstein was a flight attendant on the American Airlines flight, his sister confirmed to NBC News, while First Officer Sam Lilley's stepmother told NBC News that he was aboard the plane as well.

“We will want to tell his story eventually,” Sheri Lilley said. “He was a wonderful person.”

President-elect of the National Association of Biology Teachers, Lindsey (Carter) Fields, was onboard Wednesday's flight, the association shared.

A statement posted on Facebook on Thursday said that Fields was traveling to “advocate for excellence in life science education.”

This article was originally published on TODAY.com