Security advice has been issued by South Yorkshire Police in the wake of a spate of burglaries in Sheffield.
Homes in Handsworth, Richmond, Gleadless and Woodhouse have been targeted this week.
Overnight, a handbag containing cash, cards and mobile phone were stolen from a house in Richmond Park Road, Richmond, after a door lock was damaged to gain entry.
A house in Bramley Avenue, Handsworth, was broken into between 9pm on Tuesday and 7.30am on Wednesday after another door lock was damaged.
Attempted burglaries have been reported in Arnold Avenue, Gleadless; Richmond Park Road, Richmond and Bramley Lane, Handsworth.
A South Yorkshire Police spokesman said: "In Euro lock burglaries, the locking cylinder is literally snapped in two by applying force to the cylinder.
"Thieves have devised methods of snapping these types of cylinders locks in a matter of seconds and still be able to operate the lock to open the door.
"Euro cylinders are mainly fitted to uPVC doors but some aluminium and wooden doors also use this type of lock
"This threat can be considerably reduced simply by upgrading the cylinder to one that is specifically designed to prevent this method of attack. We recommend that all vulnerable doors using Euro-profile cylinders be upgraded to incorporate anti snap cylinders with TS007 3 star accreditation.
"Our advice is to contact a registered locksmith for advice."