An Amtrak passenger train apparently traveling on the wrong track collided with a parked freight train in South Carolina on Sunday, killing two crew members and injuring at least 116 other people in the railroad's third fatal crash in as many months, authorities said.

Investigators from the National Transportation Safety Board were in Cayce, South Carolina, where Amtrak Train 91, carrying 139 passengers and eight crew to Miami from New York, hit the CSX Corp freight train at about 2:35 a.m. local time (0735 GMT) and derailed near the state capital Columbia.

Amtrak engineer Michael Kempf, 54, of Savannah, Georgia, and conductor Michael Cella, 36, of Orange Park, Florida, were killed, Lexington County Coroner Margaret Fisher told reporters at a news conference. Autopsies were underway, she said.