Police say up to 100 vehicles belonging to a rental car company in Auckland have been stolen, leaving the boss of the company involved devastated.

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Inspector Matt Srhoj of Counties Manukau Police said the vehicles were taken from a Jucy yard in Māngere, South Auckland.

Over the weekend, several of the vehicles were recovered.

Inspector Srhoj said the total number of vehicles taken is unclear yet as a full stocktake of Jucy yards is yet to be completed.

"The stolen vehicles are Holden Captiva, Mazda 3 or Suzuki Swift (models) and are plain without branding, making them not easily identifiable as a Jucy rental vehicle from afar," he said.

Twenty vehicles have been recovered in Ōtara, Māngere and Papatoetoe, and a number of arrests have been made.

Tim Alpe, chief executive of Jucy Group Limited, said the thefts were a "kick in the guts", which came as the industry was hit hard by Covid-19 disruption.

"It's just devastating, we're going through enough as it is anyway, and tourism being decimated by Covid-19, and now to have this, it's horrific, devastating for everyone working in the business," he told 1 NEWS.

He said it was a secure site, and they had handed video footage to police.

"We thought we were safe."

He said the theft appeared orchestrated, and they were still working out how many vehicles were involved.

No staff worked on Anzac Day, so he believed that's when the thefts took place.