According to Human Rights Watch: "On January 5, 2016, at about 1 a.m., a coalition aircraft dropped a bomb on the Chamber of Commerce office, located in the Hassaba neighborhood of Sanaa city. Two guards were in the building at the time of the attack, one of whom was injured. The strike destroyed the eastern wing of the three-story building. Ali Muhammad Diab, 55, one of the security guards present, told Human Rights Watch that about 15 minutes before the office was hit, he heard a bomb hitting a residential neighborhood behind the building. He later learned that it fell in the middle of a street, but failed to explode. At about 1 a.m., a second strike hit the roof of the Chamber of Commerce building, and he fled the compound. He said that since the strike, he has had hearing problems in his right ear. Before the airstrike, the office employed 52 workers. Khalid Ali al-‘Olafi, acting head of the Chamber of Commerce, told Human Rights Watch that three large meeting rooms, the Chamber of Commerce’s records archive, and the legal and communications departments were completely destroyed in the strike. After the bombing, the Chamber of Commerce stopped using the building, which remained filled with debris at the time of Human Rights Watch’s visit. Human Rights Watch examined the site on March 24, 2016. Researchers found no evidence of military activity at the site. Employees of the Chamber of Commerce and the security guard told Human Rights Watch there was no Houthi military presence in the immediate area. The Ministry of Interior, also located in Hassaba, is located about 900 meters from the Chamber of Commerce. A neighborhood resident told Human Rights Watch that the strike targeted a meeting of Houthi commanders that took place that evening at the Chamber of Commerce building. He said that one commander died in the attack. Human Rights Watch could not confirm his account with additional sources. A Chamber of Commerce employee subsequently sent Human Rights Watch photographs of remnants he and other employees said were found at the site. Human Rights Watch identified the remnants photographed as parts of a Mk-82 500-lb bomb with a Britishmanufactured Paveway laser guidance kit. The attack on the Chamber of Commerce building was unlawful unless the compound was being used for military purposes. If the building was being used by Houthi military commanders at the time of the attack, it would have been a legitimate military target and the attack would have been lawful. Civil authorities would not be legitimate military targets unless they were directly involved in planning or participating in military operations. The coalition should provide information demonstrating that the attack was carried out against a lawful military objective. ^[+]