A family member says a U.S. missionary couple and a Haitian man who worked with them were shot and killed by gang members in Haiti’s capital who attacked them as they left a youth group activity held at a local church. Police union head Lionel Lazarre says the attack happened Thursday evening in the community of Lizon in northern Port-au-Prince. The slayings occurred as the capital crumbles under the relentless assault of violent gangs that control 80% of Port-au-Prince while authorities await the arrival of a police force from Kenya as part of a U.N.-backed deployment aimed at quelling gang violence in the troubled Caribbean country.