One man is dead and a woman has been sent to hospital after a rollover crash northwest of Calgary on early Sunday morning.

RCMP responded to the crash at just after 4 a.m. on Highway 1A near 12 Mile Coulee Road.

They say the car left the road, rolled through the centre median and ended up in the westbound lanes of Highway 1A.

The 26-year-old male driver and his 22-year-old female passenger were taken to hospital.

The man later died of his injuries.

The woman is listed in serious condition.

Police continue to investigate the crash.