DETROIT (WWJ/AP) – Detroit police say a man was critically injured when he was attacked by a pack of dogs on the city’s east side.

According to Sgt. Michael Woody, the man was attacked late Thursday after the animals had escaped from a house on Pennsylvania Street, between East Warren and Mack avenues.

READ MORE: Meet These Two Bear Cubs Who Have Become Inseparable At The Detroit Zoo

Woody told WWJ Newsradio 950’s Sandra McNeil that when police were called out to the scene, a dozen dogs were loose.

“When we found the victim he was lying in a yard, completely naked, being attacked by several pit bulls,” said Woody, “and our officers had to try to corral the pit bulls.”

Woody said police fired several shots at the dogs, killing one of them.

READ MORE: Delta Wants Other Airlines To Share ‘No-Fly’ Lists To Help Stop Unruly Passengers

The officers were then able to lure the remains 11 dogs inside the home and lock them inside. Those dogs are now in custody.

The unnamed 40- to 50-year-old victim lost both his hands and his feet in the attack. Friday afternoon, he remained in critical condition at Detroit Receiving Hospital.

At this time it’s unclear what led to the attack. Woody said police don’t know what the man was doing on the property or why he was unclothed.

Woody said investigators do not believe the dogs’ owner, who has come forward, is involved in dog fighting. An investigation continues.

MORE NEWS: Veteran Needs Help With Home Repairs

TM and © Copyright 2014 CBS Radio Inc. and its relevant subsidiaries. CBS RADIO and EYE Logo TM and Copyright 2014 CBS Broadcasting Inc. Used under license. All Rights Reserved. This material may not be published, broadcast, rewritten, or redistributed. The Associated Press contributed to this report.