The plane took off, reached about 1,500 feet of altitude and then plummeted in a steep descent, crashing less than a minute after takeoff in what National Transportation Safety Board chair Jennifer Homendy called a “high-impact crash” that left the plane “highly fragmented.”

The Learjet, carrying a pediatric patient and five others, crashed on Friday, killing all on board. On the ground, one person was killed and at least 19 others were injured, officials said.

A medevac plane crashed soon after takeoff in Philadelphia on Friday with a child and five others on board, the air ambulance company that operated it said, adding that it had not confirmed any survivors.