06/23/2015 03:27 EDT | Updated 06/23/2016 05:59 EDT

Hwy. 401 westbound closed after double-decker Megabus, tractor-trailer crash near Lancaster

Highway 401 westbound remains closed near Lancaster, Ont., after a serious crash between a double-decker Megas and tractor-trailer.

Police officers, paramedics and firefighters responded to the scene at about 2:30 p.m. ET on Tuesday to the highway near the County Road 34 exit, which is about 120 kilometres southeast of Ottawa.

Police reported about 15 people hurt in the crash, including a teenage boy who was taken to hospital with serious injuries.

The bus began its route in Montreal and was destined for Kingston, Ont., when it collided with the tractor-trailer, Megabus confirmed.

"Safety is our number 1 priority and Megabus is fully co-operating with the authorities with their investigation into the incident," the company's statement read.

The highway's westbound lanes remain closed between County Road 2 and County Road 27. Detours are in place.

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