The train's cattle guard and footboards of six coaches were damaged in the incident which occurred at 8:38 pm, they said.
Senior officials of the Railway's Lucknow division have reached the spot. The accident occurred as the truck was parked too close to the rail tracks, officials said.
The train resumed its onward journay at 9 pm after getting clearance from railway staff, they said, adding the truck has been impounded by the police.