Man goes missing on Loch Lubnaig camping trip
Police say they are becoming "increasingly concerned" for a man who disappeared while camping.
David Donnelly, from Denny, near Falkirk, was last seen at about 23:00 on Friday at a camp near the A84 between Strathyre and Callander.
Mountain rescuers, search dogs and police divers have been involved in the hunt for the 37-year-old.
Central Scotland Police said Mr Donnelly did not know the area and was not equipped for the outdoors.
The force is now searching the River Leny and the A84, after teams spent all of Sunday combing the Loch Lubnaig area for signs of the missing man.
Insp David Mitchell, who is leading the search, said: "We are growing increasingly concerned for David as he does not know the Callander area and is not equipped for the outdoors.
"This is totally out of character for him to go missing and we appeal for anyone with information to contact us."
Mr Donnelly was camping close to Loch Lubnaig with friends at a place known as Annie's Straight, three miles north of Callander, Stirling.
He is described as 6ft (1.85m) tall, with a slim build, blue eyes and short auburn or blonde hair.
He was wearing dark blue jeans, a cream or white T-shirt and Timberland beige suede boots when he was last seen.
Insp Mitchell added: "We have already carried out searches in the area since David was reported missing and we have had assistance from mountain rescue team members as well as the Search and Rescue Dog Association.
"Callander and the surrounding area is still busy with tourists and we appeal for anyone in this area who may have seen David to come forward."
The police officer said they were particularly interested in hearing from anyone who was travelling in the area on the A84 after 23:00 on Friday and may have seen Mr Donnelly.