More than 100 sheep have been stolen from fields in the Llandinam area.
Dyfed-Powys Police are investigating the theft of 99 lambs and 29 ewes which happened sometime between June 13 and July 4.
Farmers and the public have been asked to remain vigilant, check and secure the gates to land containing livestock and report any suspicious activity to the police immediately.
Anyone with any relevant information that can help this investigation, are urged to contact PC 491 Thrower at Llanidloes Police Station by telephoning 101 or alternatively Crimestoppers anonymously on 0800555111.
Any information provided will be treated as confidential.
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