Maastricht - formerly a mecca for drug tourists from across western Europe - has called for police reinforcements to handle "aggressive" street pushers, who have taken over almost all trade in marijuana and cannabis since authorities introduced tighter controls on legal outlets. The Dutch town's Mayor Onno Hoes wants to double the number of dedicated police officers in order to control the black market, which has benefited from the region's draconian "weed pass" law.