The pair then drove a short distance around The Square and went into a second jewellery store.
"This time they smashed glass cabinets and stole an unknown quantity of watches."
They spent about 40 seconds inside the store before returning to their dark-coloured Hyundai and driving off in the direction of Broadway Ave.
"Although this was late in the afternoon there were still members of the public in the vicinity."
Detective Senior Sergeant Dave Thompson said this type of offending was "clearly disturbing due to the potential risk for the nearby public and shop staff".
"It is not something that we have seen here recently, and we are determined that these offenders will be identified and held to account."
Police want to hear from anyone who was in the Plaza shopping centre and The Square at this time and witnessed the two events.
Some people may have recorded the incidents on their phones and police want to view the footage.
"The vehicle that was used drove off at speed and would have been obvious," Thompson said.
"Again, anyone that has seen a dark-coloured Hyundai driving erratically in central Palmerston North we would like to hear from them."
Anyone with information or footage of these incidents is asked to contact police via 105 quoting file number 221012/0739.
Information can also be provided anonymously to Crime Stoppers on 0800 555 111.
