Crews from Canadian National Railway and environmental companies were cleaning up overnight and today after 11 cars derailed on a track just northeast of Pense, Sask.
Potash fertilizer was spilled along the track and on the crossing where the cars went off the track.
A resident who lives next to the track said the area had been overflowing with water in the days before the derailment, and he suspected the track may have been undermined.

He and his fiancée were woken at 6:30 a.m. April 30 when the cars careened off the track about 100 metres from their home.
CN officials on the scene would not comment and an official spokesperson has not yet been available.
Updates to follow.