Emergency crewswent to workFriday following atrain derailment in southwest Saskatchewan.

It happened around midnight near Kindersley.

According to CN Rail, 12 cars loaded with containers that were heading east for Saskatoon left the tracks about 10 kilometres west of Kindersley.

No hazardous materials were involved, CN said.

The company is trying to figure out what caused the cars to derail. The Transportation Safety Board has also been contacted.