Police are investigating the death of two horses at Ilkeston.
A member of the public called officers to a field off Quarry Hill Road on Sunday afternoon, after discovering the animals.
Officers contacted the owner of the horses and they were removed from the field.
Post mortem examinations will be carried out but police believe their deaths to be suspicious.
Officers are appealing for witnesses and are urging horse owners to be vigilant. If you see someone acting suspiciously around horses, call the police.
Anyone with information about these deaths should call Derbyshire Constabulary on 101 or Crimestoppers on 0800 555 111.
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