(Jane Thomas)

Police are still investigating what caused the driver to veer into the wrong lane.

Central Saanich police are looking for witnesses in a collision that killed a 51-year-old woman and critically injured her 48-year-old sister Monday night.

Authorities say an SUV was travelling southbound when it veered across the road striking the women while they walked along the shoulder of the road.

The crash occurred just after 7 p.m. in the 7600-block of Central Saanich Road, near Mount Newton Cross Road. The women were walking their two dogs, one of which was also pronounced dead on site, while the other managed to run home.

The driver, a 26-year-old man, was also transported to hospital with unknown injuries.

“Our officers are conducting a thorough investigation that includes looking at various factors such as possible impairment, speed, medical issues, and the vehicle itself,” said Chief Constable Les Sylven.

“We are also working closely with the families affected and our officers who attended the scene to ensure they are taken care of during this difficult time.”

If you have information about this incident, call Central Saanich Police, 250-652-4441, or make an anonymous call to Crime Stoppers at 1-800-222-8477 (TIPS).