We've just heard from Toronto officials who weren't able to shed much light on yesterday's crash due to the ongoing investigation.

Here's what we did learn from that press conference:

• Toronto Pearson airport CEO Deborah Flint said investigators will be reviewing the aircraft on the runway for the next 48 hours, adding that this is "not the time" to speculate on the cause of the crash
• So far, 19 injured people have left the hospitals they were being treated at, with two people remaining in hospital for ongoing treatment
• Injuries at the time of the crash ranged from head injuries to back sprains, and nausea and vomiting due to jet fuel exposure, a representative for Peel Regional Paramedic Services said
• Although the airport had been experiencing "extreme" weather conditions, Monday was categorised as a "clear day" for operational recovery following prior disruption, Flint said
• Officials say conditions at the site of the crash were "difficult", but added that they are "used to working" in weather like that

BBC reporter Jessica Murphy asks Deputy Chief Marc Andrews for more detail on the conditions at the airport on Monday afternoon.

Andrews says he was speaking about the "environment conditions: the cold, the wind, the fact that we were still having the occasional snow".

But, he reiterates, they are "used to working in" weather like that, and the first responders did a "tremendous job".

"It's part of the environment that we operate in," he says.

And with that, the briefing has finished.

A representative from the Peel Regional Paramedic Services details the injuries that first responders encountered following the crash.

He says some passengers had:

• Head injuries
• Back sprains

• Anxiety
• Headaches
• Nausea and vomiting due to the jet fuel exposure

Peel Regional Police Deputy Chief Marc Andrews says conditions were "difficult" at the scene of the crash.

But, he adds, they "regularly practice" with other first responders and "were prepared for this event, as extreme as it was".

They "no doubt saved lives", Andrews says.

Todd Aitken, fire chief at Toronto Pearson, is speaking about the response to the crash.

He says the crew put out spot fires upon arrival at the plane wreckage.

They then did a primary search and rescue operation during which all the passengers were evacuated from the plane.

Aitken adds that most passengers "self-evacuated" following the incident.

As a reminder, you can watch this update live at the top of this page.

Image source, Reuters

Toronto Pearson airport CEO Deborah Flint is taking questions now.

Asked about the conditions on the runway during the crash, Flint says it is "not the time" to speculate on the cause of the crash.

There is an ongoing investigation "to determine all the causal factors", she says.

"We are looking forward" to getting the results, Flint adds, and will share that information "at a proper time".

She also says that there are no life-threatening injuries.

Flint now talks about operations at Toronto Pearson Airport, noting that their emergency operation centre remains open and operations on the airport's runways have resumed.

"We have been in recovery mode," she says, adding that they are currently without use of the longest east-west and north-south runways.

She says investigators on sight will be reviewing the crashed aircraft on the runway for next 48 hours. The removal of the aircraft will follow.

Jessica Murphy
Reporting from Toronto airport

Toronto’s airport, barring a slew of late and cancelled flights still today, feels very much back to normal.

Two runways remained closed on Tuesday as the investigation into yesterday’s crash continues.

Even with the delays - due to both weather and the crash - travellers are moving through the terminals at Pearson, one of the busiest airports in Canada.

It’s a juxtaposition to the dramatic footage from yesterday of the Delta flight’s crash landing.

Airport CEO Deborah Flint says the snow at the weekend was far more than Pearson usually receives - Monday was a chance for the airport to return to normal operations.

The airport has been experiencing "extreme conditions" in the days running up to the crash, Flint says, with "two separate snowstorms" and "not typical" snowfall.

There had been "many delays and cancellations" to flights in the area, she says.

Monday, however, was a "clear day", Flint says, and had been seen as one for an "operational recovery" following the weather-related disruption.

Flint goes on to give an overview of yesterday's crash.

She repeats that the plane was carrying four crew members and 76 passengers.

She says 21 passengers were injured, and adds that 19 people have since left the hospital they were treated at.

Two people remain in hospital for treatment.

Flint starts by saying "it's really important to recognise how grateful we are" there was no loss of life in the plane crash.

She praises flight attendants and crew who "heroically led passengers to safety" from the overturned plane, amid smoke on the runway.

"Thank you for all you do every day at night," she says.

Toronto Pearson airport CEO Deborah Flint is now giving an update on yesterday's plane crash.

You can follow along by pressing the watch live button at the top of the page.

Image source, Reuters

Toronto is experiencing freezing weather, with temperatures plummeting to -7C (19F) during the day, and -13C (8F) through the night.

Light snow showers and a moderate breeze are also expected.

As we've been reporting, some analysts have suggested that the harsh winter weather may be partially to blame for yesterday's plane crash.

Toronto Pearson International Airport had been experiencing many delays because of the winter weather before the crash. The airport fire chief stated yesterday the runway was dry at the time of the incident.

We're expecting to hear another update from officials in the next few minutes, which you can watch live at the top of this page.

The Toronto crash is the fourth major aviation incident in North America since the start of the year.

• The deadliest of those was an in-air collision between a passenger plane and a military helicopter near Washington DC, which killed 67 people on 26 January
• Just days later, a medical transport jet crashed into several buildings in Philadelphia, killing all six people on board and at least one other person on the ground
• And at the start of February, 10 people were killed in a plane crash in Alaska. They had been travelling from Unalakleet to Nome when the plane lost radar contact during low visibility

We're still waiting to hear an update from authorities on yesterday's plane crash at Toronto Pearson airport.

That had been scheduled to start now, but it's been pushed back to about midday local time (17:00 GMT).

And a reminder that you'll be able to watch that briefing live at the top of this page when it begins.

James FitzGerald
BBC News reporter

We're still awaiting official word as to how and why the plane crashed. Authorities are expected to give an update at 11:30 EST (16:30 GMT), which you can watch live at the top of this page.

What we do know is that shortly after 14:00 local time on Monday (19:00 GMT), Delta Air Lines flight DL4819 skidded along the runway in flames before flipping over and coming to a dramatic halt upside down, losing its tail and an entire wing in the process.

Some analysts suggest the harsh winter weather may be to blame, or that the plane may have hit something.

Airport authorities had earlier said that although recent heavy snow had stopped, "frigid temperatures and high winds [were] moving in", but the airport fire chief stated the runway was dry at the time of the incident.

Former pilot Marco Chan says the plane appeared to have made a hard landing, touching down with one wheel first. This, he tells the BBC, might have caused the landing gear to collapse on impact, causing the right wing hitting the runway and in turn causing the plane to roll.

• READ MORE:Why did a plane crash in Toronto, and how did everyone survive?

James FitzGerald
BBC News reporter

"The sheer survivability of this is really amazing," journalist and licensed pilot Dan Ronan tells the BBC, pointing out that the aeroplane's body stayed intact.

He highlights the importance of the plane's high-impact 16G seats, which he says were "designed to absorb a great deal of punishment".

Other commentators have also hailed the aircraft's safety features. CNN analyst and former FAA inspector David Soucie says the plane had broken apart as it had meant to, with the detachment of the wings stopping the fuselage ripping apart.

"Even the design of the seat back or the tray table is all part of how we consider making that survivable space," Graham Braithwaite, a safety and accident investigation professor, tells the BBC. "And the seatbelt that people have is so important - that is the ultimate thing that stops people being thrown around the cabin like this."

The flight attendants have also been praised for getting everyone off the flipped aeroplane quickly. Emergency crews on the ground were labelled "heroic" by the airport chief after reaching the crash site in a matter of minutes.

• READ MORE: Why did a plane crash in Toronto, and how did everyone survive?

A passenger filmed his escape from the upside down plane after it had skidded along the runway during a failed landing.

It shows passengers clambering over belongings and seats to reach the exit of the aircraft. Crew can be heard telling people to leave their belongings behind as they are helped through the plane door.

Alex Smith
Reporting from Washington DC

Image source, Peter Koukov via Reuters

Hello and welcome back to our live coverage.

Investigations are under way on Tuesday morning after a Delta Air Lines plane crashed and flipped over upon landing at Toronto Pearson Airport.

Twenty-one of the 80 people on board were injured, although only a few of those seriously - something analysts have called miraculous.

Officials have yet to publicly comment on what caused the crash, and authorities have released few details about what happened, but we're expecting a briefing on the incident shortly - about 11:30 ET (16:30 GMT).

Stick with us and we'll bring you the latest.

It is just after 21:30 in Toronto, and we are wrapping up our coverage for the evening.

We've heard news conferences from the airport's CEO Deborah Flint and fire chief Todd Aitken - and are expecting another news conference at some point on Tuesday.

There are questions still to be answered about exactly how the crash happened.

Here's a re-cap of some of the key details:

• Three people have been seriously injured after a plane flipped over on landing at Toronto Pearson International Airport

• All 80 people on board the Delta flight from Minnesota have been evacuated, according to the US Federal Aviation Administration
• Eighteen passengers were injured. Local paramedics said that three people - a child, a man in his 60s and a woman in her 40s - were seriously injured, but officials said they were not aware of anyone with critical injuries
• Dramatic video posted online shows passengers evacuating as firefighters douse the plane
• Fire chief Todd Aitken has said the runway was dry and cross-wind conditions were not a factor in the crash
• Police say circumstances surrounding the crash are currently unknown