Police appeal for dashcam footage after fatal Sydney Harbour ...

NSW Police said initial inquiries suggested a car headed northbound veered into the southbound lane, causing an initial crash that led to the other two cars and bus colliding at 1.40pm yesterday.

Four cars and a bus were caught up in the crash, which killed the 51-year-old male driver of a Hyundai i30 and a 44-year-old man driving a Hyundai Accent.

Two more people were taken to Royal North Shore Hospital in a stable condition.

Dashcam footage that came to light yesterday showed a white hatchback veering across the lane right before the collision.

Police are trying to track down more dashcam footage of the incident and are urging for anyone with any footage to contact crime stoppers.