Another CN freight train has derailed, this time in Saskatchewan near the town of Asquith about 33 kilometres west of Saskatoon.

Five freight cars came off the tracks Saturday evening around 7:30. A CN Spokesperson said the five cars were carrying lumber, and despite the wreckage, there was no environmental impact.

“Because the cars that derailed were carrying lumber, there is absolutely no environmental concerns to have,” explained Louis-Antoine Paquin, Spokesperson for CN Rail.

Crews were working to clear the wreckage Sunday, and the rail line has since reopened.

Despite the wreckage, no injuries have been reported.

An investigation is underway to try and determine the cause of the accident, but results of that investigation could take some time according to CN.

“Some investigations can take up to a year,” explained Paquin. “But at this point, it’s really hard to tell how long it will take for the investigation to determine the cause of the incident.”

There have been four train derailments in Alberta in the past two months, including one in October that sparked a dangerous petroleum fire that forced the evacuation of the village of Gainford.

The accidents have led Alberta's transportation minister to launch an investigation into whether rail companies are meeting their safety obligations.

With files from the Canadian Press.