Sergeant Mark Taylorsaid police would like to speak to anyone who witnessed the crash or saw any motorcycles in the Castlecliff area between 2pm and 6pm on Sunday.
“Disappointingly, after the rider crashed and before emergency services arrived, a group of people on motorbikes took the crash victim’s bike.
“We need the public’s help and want to hear from anyone who can help us identify those individuals, or anyone who has descriptions, photos or video of them,” Taylor said.
Police are also asking people in the Castlecliff area to check their road-facing CCTV or dashcams, and contact them if they have any footage.
“If you know anything about the crash or where the motorcycle may have been taken, please get in touch.
“You can contact police online at 105.police.govt.nz and clicking “Update Report” or by calling 105 and quoting file number 250525/2731."