Two girls aged one and three have died along with a woman and a man in a two-vehicle crash near Fort William.
The four people were in a Mini Cooper involved in the incident on the A82 at Torlundy just after 17:30 on Thursday.
Police confirmed the dead woman was aged 26 and the man was 25.
The 56-year-old female driver of a Ford Fiesta freed from the wreckage by firefighters was taken to hospital in Fort William with serious but not life-threatening injuries.
The A82 road was closed for 11 hours following the crash and police have appealed for witnesses.
Supt Simon Bradshaw, of Police Scotland, said: “Inquiries are continuing into the incident and I would ask anyone with information or dashcam footage who has not yet come forward to please get in touch.”