Investigators are looking into how all 76 passengers and four crew members aboard Delta Air Lines Flight 4819 survived after the plane crash-landed in Toronto on Monday.

Here's what we know so far: The Federal Aviation Administration said Delta Air Lines Flight 4819, which was operated by Endeavor Air and had traveled from Minneapolis, crashed while landing at the airport at around 2:45 p.m. There were 80 people onboard at the time.