The brother and sister of convicted serial killer Robert Pickton are suing the attorney general and solicitor general of British Columbia over the farm where RCMP found remains of the six women he was convicted of murdering.

The lawsuit filed by David Pickton and Linda Wright claims the RCMP search of the Port Coquitlam property where Pickton lived severely damaged the property.

David Pickton declined comment yesterday.

In the lawsuit, the siblings say the RCMP promised them compensation for damages but they haven't received any.

They claim the search excluded them from properties they had lawful rights to use and they accuse the RCMP of demolishing, removing, destroying or rendering uninhabitable various buildings and equipment on the property.

The two Pickton siblings, who owned the property jointly with their brother, are seeking damages, cost and interest from the province.

A spokesman for Attorney General Wally Oppal said the department hadn't yet seen the writ of summons and could not comment yesterday.

The RCMP also declined comment.