Detectives are treating as suspicious the discovery of a man's body this morning in the border village of Caledon, Co Tyrone, a few miles from Armagh city. One man has been arrested.
The body was found beside a walkway near the Blackwater River on the approach to the village.
The area has been sealed off and PSNI officers have been calling door to door as part of their inquiries.
Detectives have yet to identify the man and have appealed to members of the public who know of someone missing to contact them.
The man is described as being in his late 20s or possibly in his early 30s. He was of a stocky build and was wearing blue jeans and white trainers.
