Delta Air Lines said most passengers in Toronto plane crash released from hospital

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.

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.