A tourist from the U.S. was critically injured after falling several storeys from a building in Montreal's Gay Village early Monday morning.

Witnesses have told police that just before 1 a.m., a 29-year-old man was on a terrasse outside a bar on Ste-Catherine Street near Alexandre-de-Sève Street and used an outdoor staircase to reach the top of an adjacent building.

While on the roof, the man, who is from California, lost his footing and fell, according to police spokesperson Const. Caroline Chèvrefils.

When police arrived at the scene, they found the man unconscious and lying on the ground near the outdoor staircase. He was taken to hospital.

Sunday was the final day of the first edition Canada Pride, held from Aug. 10 to 20 and billed as a celebration of Canada's LGBT movement.