Hundreds of cars were found to be left insecure or with property on show following police checks in Doncaster.
Police Community Support Officers carried out more than 1,500 checks of vehicles parked in the town centre.
Of the 1,611 vehicles they looked at on Monday, May 12, some 176 – more than 10 per cent - were classed as ‘vulnerable’, having either property on display or being unlocked.
Superintendent Eddie Murphy said: “It takes only a second for a thief to open an unlocked car door, or to smash a window and take valuables if they are left on show. I would urge drivers in Doncaster, and across the rest of South Yorkshire, to stop thieves in their tracks by taking extra care of their property.”