The burglary, which occurred in October, is the latest security breach at the royal residence, raising concerns about the safety of the royal family.
UK police said on Monday, officers were investigating a break-in last month on the grounds of the royal Windsor Estate, reportedly while Prince William and his family were at home.
Thames Valley Police said the intruders stole two vehicles from a farm building on the estate west of London on October 13 and that no arrests had been made.
