SUDBURY -- Ontario Provincial Police have closed Highway 11 south of Cochrane due to a collision.

Police tweeted about the crash at 6:44 a.m. saying all lanes are blocked six kilometres south of the town.

The closure affects 49th Parallel Road to Girard Road.

"Reopening time is unknown," said police.

No word yet on the cause or if there are any injuries.

According to the Ministry of Transportation's Ontario 511, Highway 11 is bare, but Highway 655 is partly covered.