Concern is growing for missing 19-year-old James Corfield.
The teenager from Montgomery was last seen at the White Horse pub in Builth Wells at around midnight on Monday.
He was reported missing just before 2pm on Tuesday, July 25 after failing to meet friends at the Royal Welsh Show where he had been camping.
He is described as being 6ft 2, of slim build with short brown hair and was last seen wearing a blue Abercrombie and Fitch t-shirt and jeans.
Dyfed-Powys Police said they wanted to thank the public for their offers of support and have asked locals to check their gardens, sheds and any outbuildings for signs of James.
Officers are now following all possible lines of enquiry and are being assisted by specialist search teams at a number of locations around Builth Wells.
Anyone with information is asked to call police on 101.
The 19-year-old's body was discovered in Builth Wells last month, just days after he was reported missing at the Royal Welsh Show.
Police have confirmed the body found in Builth Wells on Sunday has been identified as 19-year-old James Corfield.
Hundreds of people gathered in Montgomery today to show their support for the missing teenager James Corfield and his family.