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).
Two helicopters have been deployed to the rescue operation, newspaper Corriere Della Sera reports (in Italian). Some of the injured are receiving first aid in a nearby field.
A witness told Repubblica newspaper that the train “began to tremble” before the accident.
Milan police chief Marcello Cardona said: “We have identified a failure between wagons, but all the investigations are still underway.”
Italy’s deadly train accidents
July 2016: Two trains collided on a single track in Puglia, killing 23 people
November 2012: Six people believed to be Romanian farm workers are killed after a van they were travelling in is struck by a train as it crosses railway tracks in Calabria
June 2009: Freight train carrying liquefied petroleum gas derails in Viareggio, causing a large explosion. More than 30 people die
January 2005: A head-on collision between a passenger and a freight train near Crevalcore kills 17
July 2002: A passenger train derails in Rometta Messina, killing eight people
April 1978: Two trains collide near a ravine next to Murazze Vado. Some of the carriages fall into the gorge, killing 42
Source: BBC
