A weapon and a pool of blood have been found in Fife, sparking fears that someone has been badly hurt.
Police have launched an appeal for information after the discovery in Foxton Drive, Glenrothes, around 10.20am on Thursday.
Officers say they are "concerned for the welfare" of anyone who may have been injured or needing medical attention.
Detective inspector Kelly McEwan said: "Earlier this morning a member of the public out walking their dog came across a pool of blood and a weapon with alcohol containers lying nearby.
"Given the volume of blood, it is believed a person could have sustained a significant injury or at least required some form of medical attention.
"We are obviously concerned for the welfare of anyone who may be injured and so would be keen to hear from people who have been in and around the area last night or early this morning.
"Initial enquiries have failed to trace any injured people and we are keen to ensure whoever was involved is safe and well and getting medical help if required."
Anyone who was in the area between 10pm on Wednesday and 10.20am on Thursday and thinks they have information should contact police on 101.