An investigation is underway into the Delta plane that crash-landed Monday in Toronto. What caused it remains to be seen, but here's what we know so far.

Delta would be paying about $2.3 million if all 76 passengers on the airline’s subsidiary Endeavor Air’s CRJ-900 aircraft accepted the deal.

One passenger said he was “drenched with jet fuel” as the planed rolled upside down and another claimed the crash occurred due to the flight crew’s "inadequate training," according to the lawsuits.