Tacks have been found on the Island Bay cycleway, causing a puncture for a cyclist.
The handful of tacks were found outside Island Bay Playcentre on Monday morning.
"They caused an experienced road cyclist to lose control due to 2 punctures in front tyre," Island Bay resident Maria Poynter said on Twitter.
"Luckily school starts tomorrow, not today, or it could have been a child. We picked up what we could see."