Newly installed Western Cape community Safety MEC Alan Winde wants to know why a police sergeant killed his wife and then himself at Hout Bay police station on Wednesday."At this stage it is unclear what led to this tragic event," said Winde in a statement, expressing his shock at the incident."I call on [the police] to launch a full investigation into this incident, so that possible reasons behind this tragedy can be ascertained."Winde conveyed his heartfelt condolences to the bereaved families, and the police at Hout Bay police station. The double shooting occurred at 10:25 at the police station.READ: Cop shoots and kills wife, himself at Hout Bay police stationPolice spokesperson Lieutenant Colonel Andre Traut said the sergeant's wife visited the police station and her husband shot and killed her during an apparent domestic dispute."He then shot and killed himself. The sergeant was on duty at the time of the incident," said Traut.The sergeant was 41 and his wife was 36 years old.The Hout Bay shooting comes after several similar incidents in recent months involving police officers.In October, a police officer, 38, killed his girlfriend and wounded her apparent lover and turned the gun on himself in Waterloo, KwaZulu-Natal;In September an East London police officer allegedly killed his wife and brother-in-law before turning his service pistol on himself; andAlso in September, an off duty police officer was shot dead by her partner in Sundumbili, KwaZulu-Natal, during a domestic dispute.