Sergeant Lyne Rushford of Forth Valley’s Community Investigation Unit said: “I would ask that anyone who sees any persons acting suspiciously around vans in the Falkirk area to call 101 or 999 if a crime is in progress.
“I’m also keen to hear from anyone who may have witnessed any of these three thefts or has information about where the vans are now.
“Van owners should take steps to make their vehicles as unattractive to thieves as possible. Always make sure you lock your van and remove any valuables, whether in the back or on display.
“Make sure your van is alarmed and park it in a garage or a well-lit, public area.”