A police dog named Hulk has helped Brazilian officers uncover nearly 50 tonnes of marijuana hidden in a rooftop bunker in Rio de Janeiro. The discovery came during a large-scale operation involving more than 250 officers, after the dog alerted handlers to a concealed hiding place. Police also seized weapons and vehicles and detained one suspect. Authorities say the bust could cost the criminal group up to $25 million. #Brazil #Rio #Marijuana #Channel4News #C4News