Mayor Cherelle Parker said five people are still hospitalized following a fatal medical jet crash in Northeast Philadelphia, three of whom are in critical condition.

The black box was discovered eight feet underground at the crash site after a two-day search and is in “decent shape,” according to reports.

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.”