THUNDER BAY -- Ontario Provincial Police say a collision involving two tractor trailers has closed Highway 11/17 near Sistonen's Corners.
Police later deemed it a fatal collision
Police have released few details about the crash.
Emergency crews remain on scene early Friday morning.
OPP, who first tweeted about the incident at about 11:30 p.m. on Thursday, say they're not sure when the highway will reopen.
