Police are warning buyers to be vigilant after a spate of bike thefts resulted in them surfacing for sale online.
There have been several bike thefts in Christchurch over the past few weeks, police say.
Two people "responsible for a large number of the thefts" had been arrested, Detective Senior Sergeant Damon Wells said, and other thefts were being investigated.
"The majority of these stolen bikes are being sold via Facebook Marketplace, and police would remind people to take care when purchasing online," Wells said in a statement today.