A pitbull that attacked another dog in Hastings on Tuesday had to be pried off with a crowbar.
A man who was cycling with the pitbull on a lead was pulled off his bike when it rushed a black labrador, a witness said.
Dog-control officers have now impounded the pitbull.
It's not known how badly the labrador or its owner were injured, but the woman was understood to have received bites to her hand. The attack occurred about 7am on Heretaunga St, near Riverslea Rd.
A witness said the pitbull, which was wearing a red bandanna, couldn't be controlled by its owner. "The guy had it on a lead but it just took off and pulled him off his bike."
The witness, who didn't want to be named, took a crowbar from his vehicle and ran to the other dog owner's aid. "I went over to it and stabbed the crow bar in its mouth and levered it open to get it off the other dog."
The man said the pitbull's owner was apologetic at first, but became aggressive when confronted by other passersby.
"People started telling him he should have had a muzzle on it and he got quite aggressive, saying he would smash over the people, then he took off."
Having seen the attack, the man said he would now back moves to ban pitbulls.
"It could have been pretty nasty if it had been a child or a smaller dog."
Hastings District Council community safety manager Phil Evans said dog-control officers impounded the pitbull.
They were waiting on more details on the attack from police, who interviewed the dog owners and witnesses, and investigating what charges could be laid.
Under Hastings dog bylaws, all pitbulls are classified as menacing, and must be muzzled and on a lead while in public.
HASTINGS, YOU GOT IT RIGHT! NOW GO THROW THAT PITBULL IN THE INCENERATOR!