Seven Japanese citizens remained missing since gunman attacked at Holey Artisan cafe and killed 20 foreigners, where they have been staying during the attack, says Japanese official.One Japanese was rescued but seven others still missing after the standoff in Dhaka’s restaurant said Koichi Hagiuda, Chief Assistant Secretary of Japanese Cabinet, in a statement. Earlier, gunmen seized Holey Artisan cafe at 8.45pm, killing 20 hostages and two officers in a siege that ended Saturday morning.All the hostages killed were foreigners and six gunmen were killed while one was held alive the military said.Troops rescued 14 hostages, according to Brig. Gen. Mujibur Rahman of the Bangladesh army.The country’s worst hostage crisis ended on Saturday morning when heavily-armed commandos stormed the popular Dhaka eatery in the diplomatic enclave and killed militants who had been holding many people, including foreigners, captive for over 12 hours.