Police are going on the offensive to combat bag snatchers and pickpockets who are plaguing Brighton and Hove.
At least three thefts are being reported daily and police fear hundreds could fall victim as residents and visitors take to the streets and beaches during the summer months.
Officers are now arming themselves with thousands of stickers when they go on patrol.
If they see an unattended handbag, mobile phone or wallet they will pounce and place a sticker on the item.
It reads "virtually stolen" and is designed to put people on their guard.
Police spokeswoman Sue Heard said: "We are making arrests but the problem is continuing and we are determined to fight back.
"These crimes bring misery for victims and many are in tears when they discover their bags or purses have been taken.
"We hope the stickers will jolt people into keeping their belongings safe."
Police will be concentrating their efforts on beaches, promenades, cafes, shops, pubs and restaurants.
One ruse thieves are using is to approach unsuspecting restaurant or pub customers to beg or ask for directions.
They place menus or leaflets over mobile phones and purses on tables and pick them up as they leave.
An eagle-eyed waiter at the Due South restaurant on the Lower Promenade, Brighton, called police after spotting suspects earlier this week.
Police later arrested two girls, aged 15 and 16 and from Eastern Europe, on suspicion of a string of these types of distraction thefts.
Ms Heard said: "These were significant arrests but we must warn people this type of theft could still happen."
Burglars are also taking advantage of the warmer weather.
A total of 14 homes were entered through open windows in the city on two nights this week.
Five were in one area - Chanctonbury Road and Wolstonbury Road, Hove.
Police urged people to shut and lock all doors and windows at night.
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