A tractor-trailer fire has closed some northbound lanes of Highway 427 in Mississauga.

Flames and heavy smoke could be spotted at the scene, located at Highway 427 and Finch Avenue.

The incident prompted police to close all northbound lanes of the highway at Rexdale Boulevard early this morning but two lanes have since reopened.

It is unclear when the highway will fully reopen.

Police have not said if anyone was injured in the fire.