Two people are in hospital after being bitten by an “out of control” dog in a village near Falkirk.
A man, 23, and 22-year-old woman were attacked by the animal around 11pm on Saturday as they walked on Bridgend Road in Avonbridge.
The man suffered serious injuries to his face and hand while the woman was treated for hand injuries.
Both remain at Forth Valley Royal Hospital.
Police have launched an investigation in a bid to find the dog and its owner.
Sergeant David Bellingham said: “This is a very serious incident of an apparently dangerous and out of control dog attacking two members of the public and leaving them badly hurt.
“We want to trace the animal and those who care for it as soon as possible and would urge anyone who was in the area and saw what happened to contact police immediately.
“Likewise if you have any other relevant information that can be of use to this inquiry then please also get in touch.”