A man has been accused of murder after getting into a fight and then chewing off portions of the victim's face at a bus stop as police arrived on the scene.

At around 4.45am on Sunday, Colin Czech, 31, was arrested on Las Vegas Boulevard after cops received a report of two men fighting in front of a business in the 1100 block.

When officers found the two men, near the 300 block of Charleston Boulevard, one of them was found unresponsive and bleeding from his head.

Officers also found Czech kneeling on the ground next to the victim with 'biological matter in his hair, mouth, and on his clothing,' KLAS reported, citing documents.

He reportedly told officers that the victim had attacked him, and that he was homeless, after cops had spotted him eating the ear and an eyeball of the other man.