Two children aged two and three have died after the car they were travelling in crashed into a loch near Oban, Police Scotland said.
A 36-year-old woman was also taken to hospital after the incident but released after treatment.
Emergency services were called to the Loch nan Druimnean off the A816 north of Kilmelford, at around 4pm on Wednesday.
Inspector Darren Faulds said: "Two young children have lost their lives and our thoughts and condolences go out to the family of those involved in this tragic incident."
A force spokesman said: "Around 4pm police and emergency services responded to a report of a car going into a loch, north of Kilmelford on the A816 near Oban.
"Emergency services attended and a 36-year-old woman was taken to Oban Hospital as a precaution and released after treatment.
"The bodies of two children, aged two and three were recovered from the water. Relatives are aware.
"Work is still ongoing to recover the vehicle from the water."
A coastguard helicopter and police dive teams scoured Loch nan Druimnean as part of the search.
Inspector Faulds added: "Inquiries are continuing to establish the circumstances and anyone with information is asked to contact the Divisional Road Policing Unit at Lochgilphead on 101."