Amnesty International cites `` serious deficiencies and abuses '' It challenges Shell 's assertion that the vast majority of spills are caused by sabotage and theft . The report says there is no evidence to support this claim, but it does not say what kind of proof they have.
Amnesty International cites `` serious deficiencies and abuses '' It challenges Shell 's assertion that the vast majority of spills are caused by sabotage and theft . Shell calls the report 's assertions `` unsubstantiated '' Amnesty cites its reporting of individual cases .