This is not the first time she's been robbed. I'm working with the police but at the same time, I have my own people.

'I've hired private investigators and I'm going to work my own investigation and find out who did this. Lindsay is not Ok. She's very upset and feels extremely violated... I'm just happy Ali and Lindsay weren't home at the time. But I feel that they were kept out of the house for a reason. This was definitely an inside job,' he added.

The Los Angeles police are investigating the robbery.

A spokesman said: 'All we can confirm is that we are investigating a possible break in at the residence and we still have officers on the scene. We got a call shortly before 7 a.m. on Sunday and it's still under investigation. No arrests have been made.'

It's not the first time thieves have targeted Lohan's home.

In May, suspects were caught on surveillance cameras entering the house, but fled after the alarm went off.