Elizabeth Hurley has stepped up security after her house was burgled.

The 52-year-old actress had friends staying with her following a dinner party when her £6 million home in Hertfordshire, South England, was targeted by thieves, who walked through the grounds of the property on foot before getting in through an upstairs window.

Though the group called police after being disturbed in the early hours of 19 November, the robbers made off with some of the 'Royals' star's jewellery, which hasn't been recovered.

A source said: ''Liz was very upset by this but has done the sensible thing and increased security.

''She got quotes from various security firms afterwards and now has state of the art security to protect her and her family.She has CCTV, sensors and on-site guards. The place is now like Fort Knox. The house is surrounded by its own grounds with entry via locked gates and a long drive.''

Police believed the raid was random and, using sniffer dogs, found the burglars had parked around half a mile away from the house and used the footpath to gain access to the house, in which the actress - who was left devastated in March when her beloved nephew Miles, 21, was brutally stabbed - lives with her 16-year-old son Damien.

The source added to The Sun on Sunday newspaper: ''They don't think Liz was targeted specifically and think thieves were just looking at large country houses to target. Liz has had a tough time recently, with her nephew being stabbed, and was particularly worried as her son was at home at the time of the break-in.''

A West Mercia Police spokeswoman said: ''At about 9am on Sunday 19 November 2017, West Mercia Police received reports of a burglary in progress at a property.

''Officers attended, and the incident was investigated. No arrests have been made. If any new information comes to light it will be looked into.''