Scores killed in early morning railway collision in Pakistan

Soldiers and volunteers work at the site of a train collision in the Ghotki district in southern Pakistan (Waleed Saddique/AP)

An express train crashed into another that had derailed in Pakistan before dawn, killing at least 45 people, authorities said.

More than 100 were injured, and rescuers and villagers worked throughout Monday to search crumpled cars for survivors and the dead.