Italy train crash: 4 killed in derailment near Milan

A packed commuter train has derailed near the northern Italian city of Milan, leaving at least 4 people dead and around 10 seriously injured.

Several people were rescued from the wreckage of the carriages that derailed at the Pioltello Limito station in the morning rush hour.

A problem with a track switch is being investigated as a possible cause, police say.

Witnesses said the train trembled for a few minutes before the accident.