A man with long hair, a tattoo and two stab wounds was found dead at the base of a building at a college in Phitsanulok on Monday morning.

The body was found about  8.30am. It was on the ground behind a building inside the college grounds, police said. The name of the college was not disclosed.

The dead man was about 170cm tall, wearing black shorts and a blue-patterned shirt. The Roman numerals XV XII  MMXL (15 12 2040) were tattooed on his right arm. His left arm was broken and he had two stab wounds, in his left arm and his back, police said.

The body was sent to Naresuan University Hospital for post-mortem examination.

Police believed he had been dead at least 12 hours when found by a college janitor.

Police said no witnesses had come forward with information on what happened. The college was closed for holidays and the security guard was in another building. The campus CCTV cameras were under repair.

Police said the man may have fallen to his death, whether by suicide or murder, or he might have been killed elsewhere and his body dumped in the college grounds. There was no blood on the ground where he was found.