A gangster was gunned down and a police officer died of injuries in a shootout at Government Medical College in Jammu and Kashmir's Kathua, police said. Sub-Inspector Deepak Sharma was critically injured last evening after an encounter with gangsters on the medical college premises. A special police officer was also injured in the encounter.According to reports, members of a gang known as Shunoo Group, reportedly led by one Vasudev, were chased by a police team. The gangsters drove their car into the medical college campus, where police cornered them.