A hunt is underway for a mystery attacker in Los Angeles who has beaten three homeless men to a pulp with a bat.

The assailant is described as another homeless man thought to be in his mid-30s who is either Hispanic or white and is bow legged.

On Sunday, he viciously attacked three homeless men within a few blocks of each other in downtown Los Angeles.

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Police in downtown L.A. are hunting for this man who has attacked three homeless men as they slept with a bat, leaving them all in critical condition

The attacks took place between 4am and 5am when the men were all sleeping.

The first was at the corner of Flower Street and 5th Street where the victim was sleeping in a secluded area.

The next two were a few blocks away at Wilshire Boulevard and Flower Street.

Those two men were discovered by a security guard who found them while carrying out his 6am patrol.

All three of the victims remain in the hospital in a critical condition. None have been named.

The attacker is also homeless and is bow legged. He was filmed on surveillance cameras near the attack going through trash cans

Police now fear the attacker will strike again unless he is found.

'This is a violent predator. Without engaging the individuals at all he just savagely beats them with a bat,' LAPD Capt. William Hayes said on Monday.

Officers have watched the attacker on surveillance footage walking around the area.

He never uses a car and is filmed rifling through trash cans which makes them think that he is also homeless.

Anyone with information is urged to contact the LAPD on 213-486-6890.