A teenage girl suffered a serious sexual assault in Balloch, police said.
The incident happened at around 11pm on Sunday, 11 September, when the 16-year-old was attacked by a man she had befriended earlier in the evening.
She was assaulted close to the footpath leading from a car park not far from Balloch Bridge.
The suspect is described as white and 5ft 7ins tall. He has a slim build and small face. At the time of the attack, he was freshly shaved and had black hair.
He was wearing a black short-sleeved top with silver logo, a grey long-sleeved base layer, black Lycra cycling shorts, black Sondico socks and grey Nike Air Max trainers. He had on a black rucksack and was riding a red mountain bike with either “Firefox” or “Fox” on the frame. Anyone with information can contact police on 101.