A Harris County, Texas, Sheriff’s deputy, an elderly man, and a good Samaritan were injured in a dog attack in a Katy neighborhood on Wednesday morning.

Deputies said an elderly man who lives in the neighborhood saw the dogs in the street and tried to get them out of the rain.

The dogs, which deputies said were “pit bulls,” were friendly at first. A neighbor told ABC13 the man was petting the dogs and their tails were wagging. Then, things took a turn.

"Apparently the dogs just turned on him for no apparent reason," Sgt. Billy Johnson with the Harris County Sheriff's Office said.

A good Samaritan passing through the neighborhood saw the attack and tried to intervene, deputies said. Then, the dogs turned on him, too.

When a deputy arrived, he also tried to intervene, but the dogs attacked him too, Johnson said. The deputy shot and killed both of the dogs.

The deputy and the good Samaritan suffered minor injuries.

The elderly man sustained severe injuries to his limbs, Johnson said. He was taken to a local hospital in critical condition. In a later update, deputies said the man is now stable and is expected to recover.