According to Human Rights Watch: "Cases of Unlawful Airstrikes on Civilian Economic Structures [...] At about 10:30 p.m. on October 10, 2015 coalition aircraft bombed two storage hangars belonging to the Electricity Company Administration for Hodaida, the local government electric utility company, located in the north of Hodaida. Three bombs hit one hangar, which stored spare parts used to repair the electricity network in the city, and one hit an empty hangar in the compound, employees told Human Rights Watch. The airstrikes did not injure any workers. They caused extensive damage to the spare parts stored in the first hangar and destroyed part of its roof. Khalil Muhammad Ali, 35, who works as an administrative employee for the facility, was outside the main gate of the hangar when the strikes hit. He said: I didn’t hear any planes, just a bang. We waited for an hour before we went inside because we were scared. The second strike hit two minutes after the first on an empty hanger right next to the first one, then the third hit two minutes later on the first hanger, but left no crater because it hit the metal roof beam. We didn’t find any remnants. A fourth hit two minutes later in the same place on the roof. Human Rights Watch examined the site on March 29, 2016. Researchers found one crater in the concrete floor about three meters wide. A large broken metal roof beam hung down to the floor where employees said the third bomb hit. Researchers could not access the second locked, but reportedly empty, storage hanger where they said the second bomb hit, as employees said it belonged to a different government authority. Employees told Human Rights Watch that no military supplies were stored in the hangar targeted, and that no military targets or Houthi installations were located nearby. One employee told Human Rights Watch that a house where about 10 Houthi fighters slept at night was located on the residential street behind the Electricity Administration compound, about 100 meters from the site. Under the laws of war electricity distribution facilities, like airports, are considered “dualuse objects” – civilian objects that also benefit an armed force. As such they can be military objectives, subject to attack. However, any attack on a dual-use object must be proportionate –the anticipated military gain of the attack must exceed expected loss of civilian life and property. Attacks on power plants that serve the civilian population are likely to cause disproportionate harm. The house where Houthi fighters slept 100 meters away was a legitimate military target. The coalition should investigate the hangar bombing to determine if they unlawfully targeted the facility and whether forces took all feasible precautions to minimize civilian loss of life and property." ^[+]