LONDON, ONT -- A woman and a young man have died following separate collisions involving motorcycles in less than 12 hours in city limits.

According to London police, the first collision occurred Sunday afternoon around 1:45 p.m.

Emergency crews responded to a single-vehicle collision involving a motorcycle at Dingman Drive and Highbury Avenue.

A 30-year-old woman was taken to hospital with life-threatening injuries; she later succumbed to those injuries.

She has since been identified by police as 30-year-old Erin Organ.

The second collision occurred in the early hours of Monday morning, not long after midnight.

Police responded to a collision between a vehicle and a motorcycle around 12:45 a.m. at Poplar Crescent and Jalna Boulevard.

A 22-year-old man was pronounced dead at the scene. The driver of the vehicle was not injured.

The name of the deceased is not being released at the request of the family.

Police have not indicated if any charges are pending as the investigation is ongoing.

Sgt. Sean Harding says, “It's still pretty early in the investigation to be able to say speed was a factor. We are obviously looking into that as possible causation for these incidents.”

There were two other fatal motorcycle crashes in the region in recent days, one man died in a crash near Fergus on Friday, and another following a crash in Kitchener on Saturday.