Regina police shot and killed a dog while investigating an assault Saturday night.

Officers were called to the 1100 block of Retallack Street for a man being assaulted at about 7:30 p.m. CST.

The suspects fled the scene, so two officers used a police dog to try to track them down.

They were led to a backyard just over a block away, on Rae Street, where they ran into a pit bull.

The two dogs started fighting. An officer tried to intervene, but he was knocked to the ground by the pit bull, said Staff Sgt. Evan Bray.

"The other officer also tried to intervene to stop the fight and ultimately prevent any injury to the officer and the dog, and being unable to do so was forced to draw his firearm and fire a single shot at the dog," said Bray.

The police dog and officers were not seriously injured. Bray said the incident is under review, which is police procedure.

Officers are still investigating the initial assault.