Greek rail workers strike in protest at working conditions after deadly crash

Firefighters search through the wreckage (Vaggelis Kousioras/AP)

Rescuers using cranes and heavy machinery have been searching the wreckage of trains involved in a deadly collision that sent Greece into national mourning and prompted strikes and protests over rail safety.

The death toll from the head-on crash involving a passenger and freight train remained at 43 as crews check the burned out and twisted carriages for more bodies.