More than 100 sheep have been stolen from two farms on Epynt and police are appealing to the farming community for information.
Dyfed-Powys Police said between 65 and 75 ewes of various ages, including yearlings, and an unknown number of new season lambs have been reported as as stolen from two farms on Epynt common near Cefn Gorwydd.
A further 14 speckled ewes with twin lambs – 42 in total – have also been reported stolen from enclosed ground at a farm in the Cefn Gorwydd area near Llanwrtyd Wells.
The thefts are believed to have taken place between July 10 and August 23 this year.
PCSO Glyndwr James said: "These kinds of theft have both a financial and emotional impact on farmers, and we are appealing for anyone with information about this incident to get in touch so we can fully investigate the circumstances.
"Livestock thefts, in particular theft of sheep, provide for challenging investigations. Forensic opportunities in livestock investigation can be very limited. We therefore rely on people to come forward with information that could lead us to the suspects.
"The people involved must have knowledge and experience of handling livestock, the means to transport them and, if planning to sell them on, knowledge of the markets."
The stolen animals are Epynt hardy hill speckled type sheep, pitch marked with a blue G, and are wearing blue and yellow coloured ear tags displaying flock number UK720141. All have ear notches above both ears and a hole in each ear, and all have long tails.
If anyone has any information regarding this crime or knowledge regarding any other Powys sheep theft crimes, contact PCSO Glyndwr James or PC Jones at Llandrindod Wells police station or by calling 101.
If you are Deaf, hard of hearing or speech impaired, text the non-emergency number on 07811 311908. Any information provided will be treated as confidential.
Alternatively, phone Crimestoppers anonymously on 0800 555111.