Police say a truck and a train were damaged in a crash at a rail crossing just south of Cadillac, Sask., shown here in a 2009 image from Google Maps. (Google)

There was a derailment in southwestern Saskatchewan Monday following a crash involving a large truck and a freight train, the RCMP says.

It happened on Highway 4 just south of Cadillac at around 1:15 p.m. MT.

The rail cars went off the tracks when the Great Western Railway train collided with the southbound truck that was pulling a flat deck trailer that held a front-end loader, the RMCP said.

Debris from the truck was carried about 1 kilometre down the tracks. The train was also damaged, but no one was injured, the RCMP said.

Two rail cars were derailed along with a set of wheels on the lead locomotive, the RCMP said.

Police said the the highway was closed in both directions, but later in the afternoon the train was separated and traffic was allowed to continue.

The cause of the accident isn't known. RCMP from the Ponteix detachment said they continue to investigate.

Cadillac is 64 kilometres south of Swift Current.