Wellington City Council is on the hunt for whoever is scattering tacks along the Island Bay cycleway.
Council spokesperson Victoria Barton-Chapple said they had dealt with this issue back in 2016 and 2018, and had hoped that would be the last of it.
"Our street cleaners do regular sweeps, but it's happening again and we're not putting up with it anymore."
She said they would be reporting any CCTV footage they could find to police.
"This behaviour is unacceptable and needs to stop before someone gets seriously injured."