Authorities say at least 18 people are injured after a Delta Air Lines plane flipped upside down while landing amid wintry conditions Monday at Toronto Pearson International Airport.

John Nelson and 79 other people were on a Delta Airlines plane Monday that crashed when it landed then came to a rest on its roof.

Endeavor Air, based in Minneapolis, is a subsidiary of Delta Air Lines and the world’s largest operator of CRJ-900 aircraft. The airline operates 130 regional jets on 700 daily flights to over 126 cities in the U.S., Canada and the Caribbean, according to the company’s website.

Representatives for Delta did not immediately respond to Reuters’ request for comment. TV reports said up to eight people were injured but there was no report on the extent of injuries. Of the eight injuries, one was critical and the rest were mild to moderate, Peel Regional Paramedic Services Supervisor Lawrence Saindon said.

Live above: Authorities respond to the Delta Air Lines flight that crashed and landed upside down in Toronto, Ontario, Canada. (NEXSTAR) — A Delta Air Lines flight from Minneapolis experienced an “incident upon landing” in Ontario, Canada ...

The airport confirmed an “incident” occurred Monday with a Delta flight from Minneapolis and all 80 passengers and crew are accounted for.

Minnesota authorities are in contact with airport officials as they continue to gather more information about the injury crash.

Investigators probing Monday's Delta plane crash at Toronto Pearson International Airport are piecing together what caused the dramatic incident.

Former paramedic Peter Carlson is still having difficulty putting into perspective the shuddering jolt he and 79 others aboard Delta Air Lines flight 4819 experienced earlier this week.

"The CRJ-900 departed Minneapolis/St. Paul International Airport ... during a layover en route to see relatives in Thunder Bay, Ontario. Then, a friend texted him that a plane had crashed just ...