An investigation was launched on Wednesday by prosecutors after a train derailed upon leaving a northern Italian station on its own. Reports state the driver and conductor of the train stopped and stepped out for a break when the train left the station, which was carrying one passenger on board, while traveling for about seven kilometres (four miles). 

The three-carriage train was travelling between Milan and Lecco in the northern Italian region of Lombardy before going off a truncated track near the town of Carnate at noon. The train had travelled to north of Milan without its driver or the conductor, the railway had said in a statement. Among those who sustained minor injuries in the incident were three people including the passenger. 

A probe was launched by public prosecutors after regional railway Trenord stated that "for reasons to be ascertained" the train had left Paderno station "without any staff on board". The railway company's statement further said that the safety system routed the train next to a section of unused track at the Carnate-Usmate station. One carriage of the derailed train was seen leaning on its side, while another at a 45 degree angle off the track. 

According to reports, as the train sped, the only passenger traveling made an attempt to escape by breaking a window. He was later given first aid after the train derailed and was taken to a hospital for further treatment. The train line connects Milan and the Lake Como, and crosses the industrial area of Brianza.