UPDATE: Gwent Police have reported that Mr Brown was found safe and well on Saturday April 9.
Gwent Police is appealing for information after a 37-year-old man went missing.
Jonathan Brown, from Caerphilly, was last seen in the car park of Castel Coch on the morning of Friday April 8.
He is described as white, 6ft 2in tall with stocky build, shaven bald head, clean shaven, wearing a purple Next T-shirt with writing on the front, blue jeans and white trainers.
Anyone with information to his whereabouts are asked to call Gwent Police on 101.