Mounties say two separate accidents on the same stretch of Highway 1, one involving an SUV that rammed into a police cruiser, sent at least four people to hospital early Sunday morning.

RCMP Insp. Davy Lee said alcohol was a factor when a motorcyclist with passenger rear-ended a car in an eastbound HOV lane on Highway 1 between Kensington Avenue and Gaglardi Way at around 1 a.m. Sunday morning.

The driver and passenger were transported to hospital with injuries, which were not as serious as RCMP first believed, Lee said.

The driver is currently under investigation for impaired driving, but charges have not yet been laid, he said.

EXTENDED VIDEO: Two separate accidents shut down Highway 1

Then, while two police cruisers were pulled over in a westbound HOV lane with emergency lights on, an SUV smashed into one cruiser from behind, which then collided with the cruiser in front of it, according to RCMP.

The resulting chaos trapped the occupants of the SUV and firefighters had to extricate them with the Jaws of Life, Lee said. At least two occupants of the SUV were sent to hospital following the incident.

Visibility may have been an issue, Lee said, but RCMP are still investigating the cause of the accident.

He confirmed no officers were hurt in either accident but the three vehicles involved in the westbound lane crash suffered “significant” damage.

Highway 1 was temporarily closed in both directions following the crashes but has since reopened.