The Delta Airline plane which crashed into Toronto Pearson International Airport earlier today, injuring fifteen people, was seen making a huge U-turn before reaching its destination. Chilling images and videos surfaced on social media showing the plane lying upside down on the runway with first responders surrounding it, reports the Mirror. Another video captured thick smoke billowing from the crash site. The ill-fated flight was Delta 4819, travelling from Minneapolis, Minnesota, in the United States to Toronto. The aircraft was seen on a FlightRadar24 flight map flying over Brampton, heading towards Markham before executing a sharp U-turn and flying into the airport. The airport issued an alert about an "incident" on the runway, stating: "Toronto Pearson is aware of an incident upon landing involving a Delta Airlines plane arriving from Minneapolis," and "Emergency teams are responding. All passengers and crew are accounted for." At least fifteen people were injured in the crash, as reported by Toronto paramedics. John Nelson, a passenger on the aircraft, shared a video on Facebook documenting the scene. In his video, Nelson stated: "We just landed... Our plane crashed... It's upside down. The fire department is on-site." He reported that passengers were disembarking amidst the smoke from the aircraft, adding that "most people appear to be okay". Delta released a statement saying, "Delta is aware of reports of Endeavor Flight 4819 operating from Minneapolis/St. Paul to Toronto-Pearson International Airport as involved in an incident. We are working to confirm any details and will share the most current information on news.delta.com as soon as it becomes available," the statement read. Pearson International Airport experienced numerous flight delays due to heavy snowfall over the weekend. "We are in for another weekend of winter weather. Our surface maintenance specialists are hard at work clearing the airfield so we can keep planes moving safely. Significant weather events may cause airlines to cancel or delay flights," it posted on Sunday. It remains unclear if the heavy snowfall contributed to the plane crash, which occurred hours after the airport shared an update on a clear runway. Don't miss the latest news from around Scotland and beyond. Sign up to our daily newsletter .