A Canadian Pacific Railway freight train has derailed in southwestern Saskatchewan.

Transportation Safety Board spokesman Eric Collard says 36 cars went off the tracks Tuesday night west of Swift Current.

He says the train was not carrying any dangerous goods, no spills and no injuries.

The train was heading west when it derailed at the Maple Creek subdivision.

Collard says one of the cars that derailed was carrying potash.

TSB investigators were heading to the area.

Last month, up to 40 CP rail cars derailed southeast of Saskatoon.

That train was carrying potash and no dangerous goods were involved.