Commuter train crash in Milan kills at least 3 More than 100 commuters were injured.

ROME -- A packed commuter train derailed during morning rush hour outside of Milan, Italy, killing at least three and injuring more than 100.

The accident happened on the busy Trenord commuter line as the train was leaving the Pioltello-Limito station around 7 a.m. Multiple cars flipped on their sides while others teetered precariously.

Dozens of emergency personnel arrived on scene, with firefighters using cutting tools to free passengers trapped inside cars. At least five passengers reportedly suffered serious injuries, while dozens of others had minor injuries.

Authorities earlier said at least four people had died but later lowered the death toll to at least three. Firefighters said all three were women.

An initial inspection by Italian Railways indicates there was a break of about 8 inches in one of the tracks about a mile from where the train derailed.

The Milan prosecutor's office has opened an official investigation into the incident.