Taxi drivers in the Falkirk district have been warned by police to ensure their vehicles are secured when left overnight.
It follows a series of thefts from cabs left parked in Denny and Dunipace in the last 24 hours.
Thieves smashed windows in order to steal change in what police believe was a pre-planned attack.
The incidents took place in Ferguson Drive, Bulloch Crescent, Linden Avenue and Beech Crescent.
Drivers are being urged to remove all cash from their cars when they are parked for the night.
Sergeant Ally Goldie of Larbert Police Office said: “We have received a number of reports of vandalism and thefts to taxis in Denny which occurred overnight between Sunday, July 5 and Monday, July 6.
“Change was stolen from each vehicle and we believe that they were deliberately targeted for this purpose.
“We would advise all vehicle owners to remove any money from their vehicles overnight and ask that if anyone should any see suspicious behaviour to contact police immediately.
“Anyone who witnessed these incidents, or has any information which can help officers with their enquiries, is asked to contact Police Scotland on 101 or contact Crimestoppers anonymously on 0800 555 111.”