The train was reported to have
run away from
Paderno d'Adda without crew, and with a passenger detected after the derailment. The train was to operate a Paderno d'Adda-
Milan service about 25 minutes after the start of the runaway from Paderno d'Adda, which took place about 15 minutes after its arrival from Milan; the train was diverted into a siding at
Carnate-Usmate station. The control car and the first three carriages of the train derailed. Three people were injured (the passenger, and the 2 crew members while trying to get on the runaway train in Paderno d'Adda); they all suffered minor injuries, and the passenger was taken to the hospital for checks. The driver and conductor of the train were suspended from duty after the accident. ==Investigation==