Delta Air Lines on Tuesday said 19 out of the 21 passengers transported to local hospitals after a Toronto plane crash on Monday have been released, as officials continue a probe into why the regional jet flipped over upon landing.

The wreckage of a Delta Air Lines-operated CRJ900 aircraft lays on the runway after a plane crash at Toronto Pearson International Airport in Mississauga, Ontario, Canada February 18, 2025. REUTERS/Cole Burston

Investigators from Canada's Transportation Safety Board (TSB) are leading the probe to figure out why the CRJ900 aircraft operated by Delta Air Lines' Endeavor Air subsidiary went belly-up on Monday at Toronto's Pearson Airport.