Auckland University has stepped up security patrols around its bike parks after a petition was sparked by a wave of thefts.
Police are looking for two men pictured allegedly using bolt-cutters to take bikes from outside the university's Grafton medical school on Wednesday, believing they may also have been responsible for raids on a campus lock-up off Symonds St.
One had a high-visibility vest which area crime prevention manager Sergeant Roy Simpson suspects was used to dampen the curiosity of potential witnesses. Neither was wearing a helmet.
Mr Simpson fears the pair have been stealing bikes to order and students' association president Paul Smith says the uni has been hit by "an almost industrial scale of thefts".
One student said he understood about 30 bikes had been stolen in a month from the city campus, before the university added closely woven steel mesh last week to stop thieves prising their way into the cage.