Police investigators were waiting at a hospital last night to question a mainlander lying in a coma after surgery following a fatal collision in mainland waters between Hong Kong smugglers and a Shenzhen marine police vessel. A Shenzhen marine police officer was killed and six officers were injured when their vessel was rammed by a boat carrying smugglers from Hong Kong in Dapeng Bay in Shenzhen on Monday night. Marine police regional commander Au Hok-lam said the man was injured in the leg and was receiving treatment at North District Hospital in Sheung Shui. 'We are waiting for him to wake up so we can question him,' Mr Au said on Cable TV news last night, stopping short of calling the mainlander a suspect. 'He claimed he was injured while fishing.' A police spokesman said the collision had taken place outside Hong Kong waters and was outside the jurisdiction of local police. But he confirmed that the boat used by the smugglers was registered in Hong Kong and that its owner had reported it missing before the incident. The vessel has since been impounded by Shenzhen marine authorities. A Shenzhen interceptor vessel with seven officers on board went to Dapeng Bay on Monday night, acting on a tip-off that Hong Kong smugglers were about to deliver items to Shenzhen. The officers ambushed the smugglers' speedboat at about 9pm, but their boat was then rammed by the other vessel. An officer, Ai Wei, died when he was hit by the smugglers' boat. Both vessels capsized. Another boat picked up the smugglers and is believed to have taken them back to Hong Kong. Shenzhen police say ramming police marine boats is a common tactic employed by smugglers.