THIEVES have broken into a post box in Quadring and taken all of the post from inside.
Police say the post box in North Drove is one of two targeted between Christmas and New Year.
A similar post box, which is mounted on a wooden pole in Milestone Lane, Pinchbeck, was the first to be attacked between Christmas Eve and December 28.
Officers say they believe bodily force was used to fracture its door but the offender did not get inside.
The attack in North Drove happened some time between December 27-28.
Sgt Stuart Hurst said: “This is a very serious offence and we would be interested to hear from anyone who has information.
“I would like to reassure the public that anything they put in a post box 99.9 per cent of the time, it will get to its destination.”
The theft has been reported to Royal Mail.