A number of catalytic convertors were stolen from vans in Laurieston last week.
The thefts took place in the Bog Road area overnight between Wednesday, July 4 and Thursday, July 5.
Catalytic convertors were also taken from vehicles parked in Bankside Industrial Estate some time overnight between Saturday, July 7 and Sunday, July 8.
Anyone who has information relating to these crimes is asked to contact Police Scotland on 101, quoting incident number PS-20180708-1451.
Alternatively, call Crimestoppers anonymously on 0800 555 111.