A purse containing cash and a bank card were stolen after someone broke into a Renault Clio parked in Homefield Avenue.
It happened between 6pm on Wednesday and 8am on Thursday last week.
Police are asking anyone who saw someone taking the purse or anyone with information about the person responsible to call Pc Smy at Lowestoft on 101.
Officers are also urging drivers to remember to lock vehicles and to remove all valuables before leaving cars or vans unattended.
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