Ozzy Osbourne is going to extreme measures to ensure that his mansion is not burgled again.

A robbery at the Osbournes' home this week led to the loss of jewellery, including Sharon's wedding and engagement rings.

Ozzy is now planning to hire 24-hour security guards, with guard dogs, as well as installing laser tripwires.

An insider told Female First, "He's shocked and angry. He can't understand how what he thought was a good security system failed."