Page last updated at 10:10 GMT, Saturday, 28 June 2008 11:10 UK

Police raid river boats on Thames

River police have carried out raids on pleasure boats on the Thames in London as part of a new summer campaign to clamp down on drugs and weapons.

During the operation on Friday, four people were arrested on suspicion of cannabis possession. They are currently being held in police custody.

Five other people were given warnings for possession of cannabis.

Officers used search arches, handheld scanners and search dogs to search people boarding the boats.

"We know that a small minority of people are using drugs and carrying weapons on party boats," said Ch Insp Derek Caterer.

"They wrongly assume that because they're on the water the police can't reach them.

"This operation is all about clamping down on the violence and drugs that can be a feature of night life on the Thames."

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