John Billups, 48, was walking along Chappell Road in southwest Atlanta when he was attacked by two dogs, believed to be pit-bull mixes, Channel 2 Action News reported. Billups was unconscious when police and paramedics arrived and was taken to Grady Memorial Hospital. His arms and face were injured in attack, according to police.

Animal control officers picked up both dogs, but investigators had not located the dogs’ owners late Monday.