The intruders entered a farm building on the castle estate last month and stole an Isuzu pickup and a quad bike, according to the local police.

Windsor Castle is currently under watch of the police, as a pair of two masked raiders trespassed on the property last month while Prince William, Kate Middleton, and their three children—Prince George,

Police are investigating a break-in on the grounds of Windsor Castle, near the family home of Prince William and his wife Kate, the Princess of Wales. The suspects were able to enter a building and steal two items from the royal family estate in Windsor, England, on Oct. 13, a spokesperson for the Thames Valley Police told ABC News.

Kate Middleton and Prince William plan first Christmas together since the Princess of Wales concluded her chemotherapy treatment for cancer at Sandringham.

Two masked men are reported to have scaled a six foot fence to steal farm vehicles from the Windsor Castle estate while Kate Middleton and Prince William were sleeping nearby with their three children

Christmas at Sandringham, a tradition for members of the royal family, will be a slice of normality for the couple at the end of a very atypical year