The Transportation Safety Board (TSB) has determined that Sunday’s train derailment in Delta, BC was caused by a collision between two locomotives. A southbound train passed a stop signal and collided with a northbound train that was stopped. This led to two southbound locomotives and five train cars derailing. Crews are on the scene cleaning up a fuel spill resulting from the collision. The TSB is not yet in a position to confirm the crew’s experience, and BNSF Railway continues to investigate the incident. No injuries have been reported.