The aircraft involved is a Bombardier CRJ-900LR commuter jet belonging to Endeavor Air, which is wholly owned by Delta.

It is fitted with 12 first class and 64 economy seats.

Endeavor Air is based in Minneapolis-St Paul airport in Minnesota, where flight DL4819 originated. The plane took off at 11.47am local time, and flew at 29,000 feet over Wisconsin, Michigan and Ontario.

It turned to approach the runway at Toronto airport at 2.05pm local time, but overturned on landing.

Officials at the Toronto Pearson International Airport had been preparing for a demanding day before the crash.

Over 130,000 travelers would be coming through the airport Monday on roughly 1,000 flights.

The city had just experienced a snowstorm that brought in eight inches.

The airport’s airfield team had worked overnight to prepare the facility. Officials noted high winds were expected in the area.

The National Transportation Safety Board is leading a team of US investigators to assist the Transportation Safety Board of Canada in their investigation.

Per international protocols under the International Civil Aviation Organization's Annex 13, any information about the investigation will be released by the Transportation Safety Board of Canada, the agency said in a statement

Following the crash landing at 2.13pm local time, dozens of inbound flights have been diverted to other airports in Canada and the US.

First to divert was British Airways flight BA93, which landed at Hamilton airport. This was also the destination of Air Canada from Varadero in Canada and WestJet from Calgary.

Montreal’s Dorval airport took in diverted Air Canada flights from Fort Lauderdale in Florida, San Jose in Costa Rica and Cancun in Mexico.

An Air Canada flight from Vancouver also landed at Montreal, while a second returned to its starting place.

Ottawa received Air Canada flights from Halifax, Boston and Edmonton, as well as WestJet from Orlando.

United has so far diverted two aircraft: a Washington DC flight that went back to the departure airport, and a service from Denver that landed in Chicago.

Delta’s arrival from Salt Lake City is in Detroit, while Alaska Airlines from Seattle touched down in Pittsburgh rather than Toronto.

One child was transported via ambulance to a children’s hospital, while two adults were transported via air ambulance to other medical facilities, Ornge, an ambulance company that responded to the incident said.

The majority of those injured had minor to moderate injuries.

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A spokesperson for Delta Airlines said 18 people were transported to area hospitals following the crash.

Initial reports said at least 15 people had been harmed in the incident.

“Our primary focus is taking care of those impacted,” the airline said in a statement.

Delta is suspending flights to and from the Toronto airport for the remainder of the evening and has issued a travel waiver.

Delta officials are asking people with family and loved ones on the flight to contact 1-866-629-4775 in Canada and 1-800-997-5454 in the United States.

“The hearts of the entire global Delta family are with those affected by today’s incident at Toronto-Pearson International Airport,” said Delta CEO Ed Bastian.

“I want to express my thanks to the many Delta and Endeavor team members and the first responders on site.”

Canadian officials are holding a news briefing to provide an update on the transportation disaster.

The news conference is due to start at 6:30 pm local time.