Six unlocked cars were targeted by thieves in one night.
The thefts happened in Granborough and Winslow on Wednesday night/Thursday morning.
In Sheep Street, Winslow, a purse and keys were stolen from a black Volkswagen. Thieves also got into a Mitsubishi but nothing was stolen.
In Winslow Road, Granborough, a wallet was stolen from a black Citroen DS3, sunglasses were taken from a Wolkswagen Up! and there was an attempted theft from a black Ford Focus.
Police have warned people to make sure their cars are locked and no valuables are left on display.