A man is recovering in hospital after being stabbed in an attack outside his home in Dumbarton.
The 49-year-old was assaulted after opening the front door of his flat in Wallace Street to two men at about 0225 BST.
He was taken to the Royal Alexandra Hospital in Paisley.
Detectives said they believed the man was the intended target. They have appealed for information.
Officers were carrying out door-to-door inquiries.
The attackers fled from the top floor flat in an unknown direction.
The first suspect was described as a white male, aged 20-25 years, about 5ft 9in tall, average build, blond wavy hair, fair complexion and was wearing a green safari-style jacket with two breast pockets.
The second man was also a white male, 20-25 years, about 5ft 5ins tall, average build, short black hair, fair complexion and was wearing dark clothing. He spoke with a local accent.
Det Con Lawrence Malley said: "At this time we have no clear motive for the attack. However, the victim certainly seems to be the intended target, and thankfully he hasn't been more seriously injured.
"I appreciate not a lot of people would have been in the area at 0230 this morning, however there may have been taxi drivers or dog walkers in the area who could have unwittingly seen the men responsible.
"If anyone has any information or recognises the suspect descriptions please let us know."