As day broke in Philadelphia on Wednesday morning, rescue workers were still searching inside the mangled wreckage of an Amtrak train that derailed the night before, killing at least six people and sending another 146 to various hospitals. Temple University Hospital medical director Herb Cushing said Wednesday morning that 25 passengers were still at Temple — the closest trauma center to the crash site — eight of them in critical condition. Cushing said many of the injuries suffered by passengers came when other passengers or objects fell on them.

“It is an absolute, disastrous mess,” Philadelphia Mayor Michael Nutter said of the crash site. “I’ve never seen anything like this in my life.” Amtrak Northeast Regional Train 188 was traveling from Washington to New York when it derailed in the Port Richmond neighborhood of Philadelphia about 9:30 p.m. Tuesday. The impact tore cars apart, sending seven of them flying from the tracks, and left the engine a mangled mess.