Three arrested over man's death in NT

Two men and a woman have been arrested over the suspicious death of a man in the Northern Territory.

Police on Thursday found the 22-year-old man collapsed on a footpath in the northern beaches suburb of Nightcliff.

He had serious injuries to his right biceps and had lost a lot of blood, police told the ABC.

It appeared the man had walked from the nearby Litchfield Court unit block to the footpath where he was found.

Two men, aged 27 and 31, and a 33-year-old woman have been arrested and remain in police custody.

No charges have been laid.