The Hong Kong police are investigating the death of an officer, who was believed to have taken his own life using his service pistol at a marine division base on Sunday, the force have said. On Sunday at around 3.20 pm, police found a 51-year-old officer injured inside a changing room at the Marine Harbour Division Base in Sai Wan Ho, a spokesperson for the police said. The officer had a gunshot wound to his head and was certified dead at the scene, the spokesperson said. “A service pistol was found next to the deceased,” the spokesperson added. “Upon initial investigation, it is believed that…