Whanganui Police are searching the area around the Whanganui Regional Museum for a man who stole jewellery from Michael Hill Wanganui.
A police vehicle could be seen parked on Watt St and a dog unit was called in to track the man.
The jewellery store on Victoria Ave was forced to close its doors early due to the theft.
A police spokesperson said the theft occured at approximately 4.30pm.
"There was a theft of some gold chains from a jewellery store on Victoria Avenue.
"A would-be customer ran off with these and police are working to locate him. At this stage he has not been located."