A truck and trailer collided with a southbound freight train at a level crossing on Tararua Rd, Levin on Monday night at 9.10pm.
A witness said petrol was "pouring" onto the road.
No one was injured in the incident, police said at the time.
A Fire and Emergency spokesman said they attended the scene but soon left as there were no injuries or people trapped.
Police initially said the truck was carrying live pigs, many of whom died as a result of the impact, however people the