Police can freeze Cheung Tze-keung's assets under the Organised and Serious Crimes Ordinance even though he was arrested and detained on the mainland. A police spokesman said the ordinance empowered the force to apply to freeze any proceeds of crimes committed in Hong Kong. Cheung has been accused of a string of cross-border crimes, including kidnapping, smuggling of explosives, robbery and murder. But officers declined to say how much of the $160 million haul which police served a restraint order on yesterday was owned by Cheung. Under the ordinance enacted in 1994, the High Court may, by a restraining order, stop anyone dealing with any realisable property, subject to conditions and expectations as may be specified in the order. A court hearing would decide when the order should be lifted. If the court agrees with the legal grounds to restrain the assets, police can then apply to confiscate the proceeds if the owners are convicted of related crimes.