According to the FAA, a Learjet 55 departed from Northeast Philadelphia Airport en route to Springfield-Branson National Airport in Missouri when it went down.

Police say the plane was on a medical assignment. The FAA and Secretary of Transportation Sean Duffy said six people were on board.

In addition to four crew members, there were two passengers, including a pediatric patient, according to Jet Rescue Air Ambulance, a company based in Mexico that provides global air ambulance services.

"At this time, we cannot confirm any survivors," the company said in the statement. "No names are being released at this time until family members have been notified. Our immediate concern is for the patient's family, our personnel, their families and other victims that may have been hurt on the ground."

Speaking at a news conference shortly after 8:30 p.m., Philadelphia Mayor Cherelle Parker said officials could not yet provide a number of fatalities.

"So right now we're just asking for prayers," she told reporters.

According to reports, one of them tried to cut in line, which led to the fight.

A 27-year-old man was the victim of a knife attack on the metro in Lyon on Sunday. He had a 7 to 8 centimeter wound on the back of his neck. Just couple of centimeters to the side and he’d died, so he was lucky in that sense.

An investigation has been opened for “attempted voluntary homicide” the Lyon prosecutor’s office said.

A pair of apparent street vendors were arguing and at one point one of them sprayed a flammable liquid - believed to be cane - on the other and himself, then lit a fire with a lighter, according to a closed-circuit television (CCTV) video. The man who was sprayed with the liquid burst into flames and ran away. As he ran, he took off clothes to put out the fire. The hair of the person who started the fire also caught fire, as he had poured the flammable liquid over his head. He managed to put them out, as can be seen in the images.

Apparently, the injuries suffered by both were not serious and were only superficial burns.