Police have evacuated Hamilton Gardens after a bomb threat was received via the independent crimestoppers line

An anonymous bomb threat at the Hamilton Gardens on Thursday has brought the tally of bomb scares to three this month.

The threat comes after an evacuation in Wellington where a suspicious item was found on Wednesday that closed off a large section of Lambton Quay for more than four hours. Earlier on Tuesday, November 10, Hamilton police investigated an alleged threat to detonate a bomb outside the Hamilton Central Police Station.

Police blocking the main entrance to the Hamilton Gardens after a bomb threat.

Police evacuated the Hamilton Gardens for two hours after a phone call was made from someone saying a bomb had been planted at the popular tourist attraction. It was received via the independent crimestoppers line about 1.35pm on Thursday.

At 3.15pm police, in conjunction with Hamilton City Council staff, had cleared the venue and were satisfied public safety was not at risk.

Inspector John Kelly of Hamilton Police said there were no details made about the threat at Hamilton Gardens.

"There was very little specific information provided to the call centre other than to say there was a bomb in the Gardens' area."

"People who know the area will be aware it is a very large venue with several gardens and buildings so the most prudent step to take was to close down access to the facility and evacuate people from the area," he said.

"From there an ongoing threat assessment was started."

Hamilton City Council's full council meeting was adjourned briefly as elected members were informed of the bomb threat.

Hamilton Mayor Julie Hardaker said the Gardens were checked by police and reopened after less than two hours.

She said security at Hamilton Gardens is taken extremely seriously.

"Our City Safe staff regularly circulate throughout the Gardens and are well-trained to look for suspicious behaviour," she said.

"We thank the police for their fast and effective response and their liaison with staff. The bomb threat made against this amazing much-loved venue is just appalling and we're extremely disappointed that someone would do this to such a family-friendly location."

Meanwhile the man arrested for allegedly planting four fake bombs in Hamilton parks earlier this year has made another court appearance.