A commuter train has derailed near the northern Italian city of Milan, killing at least three people and injuring about 100, officials say. Firefighters are trying to free several people trapped in the carriages of the train that derailed at the Pioltello Limito station. Ten people are critically injured. Hundreds of commuters were on board. A problem with the coupling between carriages is being investigated as a possible cause of the accident. The Trenord train was heading to Milan's Porta Garibaldi station from Cremona when the incident happened at around 07:00 (06:00 GMT).
The cause of the accident is not yet clear but a collapse of the rail track is under investigation.