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NZ Herald photographer George Heard saw the incident unfold at Somerfield Park on Thursday morning.
"They're trying to control a bull that's got loose. I understand it has come down Barrington St.
"They think it might have come from the A & P showgrounds."
Police started receiving reports of sightings of the bull near Barrington Street in Addington from about 6.30am today.
The bull was tracked down by police and animal control to Sydenham cemetery, and is now contained and waiting to be picked up by its owner.
It is believed to have come from the A&P Showgrounds.
The animal escaped from the showgrounds and made its way to the park - about 6km away.
The bull took off overnight and it was noticed to be missing this morning.
He said there are a lot of children walking to school who have stopped for a look.
- NZ Herald and RNZ