A hospital is appealing for information after a man went there claiming he does not know who he is.
The patient – thought to be in his early 40s – arrived at Forth Valley Royal Hospital in Larbert, Scotland, on Boxing Day.
He did not have any personal documentation, NHS Forth Valley said.
He is 5ft 6in tall, of medium build, with receding brown hair and stubble on his face.
When he got to the hospital he was wearing a green checked shirt and blue t-shirt above black jogging bottoms and trainers.
The man, who speaks with a local Scottish accent, has tattoos on his upper right arm of two Samurai swords, and a tattoo on his chest of a Samurai.
Anyone with information should call Police Scotland on 101, using reference number 1665.