It might sound strange, but if you find small white stones outside of your home that you didn’t put there, then you need to contact authorities as a matter of urgency.

They could be pretty easily dismissed for an escaped pebble from someone’s garden or kids trying to mess with you, but the reality is unfortunately much darker than that.

Criminals have been leaving these little white stones outside people’s homes, on their drives or under car tires as signs to other thieves to let them know ‘vulnerable’ people live in the property, according to the Mirror. 

Neighborhood watch groups have now become increasingly concerned about this strange and unnerving activity and are encouraging people to contact police if they see any of this going on.

So far this sinister venture has been reported in several roads in Portishead, Bristol and worryingly, a man delivering charity bags has been spotted dropping the stones around the neighborhood.

Read more about what to look for to keep you and your home safe on UNILAD.