According to Human Rights Watch: "The Saudi Arabia-led coalition fighting in Yemen carried out at least six apparently unlawful airstrikes in residential areas of the capital, Sanaa, in September and October 2015, killing 60 civilians. Coalition members and the United States, as a party to the conflict, are required under the laws of war to investigate such attacks, but they have not. Human Rights Watch found no evidence of any military target in an airstrike on the Old City and on al-Asbahi neighborhood in September. Airstrikes that caused civilian casualties on homes on Marib Street and in the neighborhoods of Hadda, al-Hassaba, and Thabwa hit 200 meters or more from possible military objectives. These attacks failed to distinguish civilians from military objectives or caused disproportionate civilian loss. Houthi forces in at least two of the attacks put civilians at unnecessary risk by deploying in densely populated neighborhoods.... On September 21, starting at about 4:30 a.m., four airstrikes hit houses in Sanaa’s al-Hassaba neighborhood, where the Houthis had placed civilians at risk by deploying their forces in a densely populated residential area. The strikes destroyed four homes and damaged at least 11 others. The fourth strike killed 20 civilians. They included 18 members of an extended family, six of them women and 11 of them children. Six residents told Human Rights Watch the first strike hit the home of Sam al-Ahmar, which Houthi fighters had been occupying for a year. Three residents said that the Houthis had evacuated the home the night before the strikes, leaving three guards, one of whom was wounded in the strike. A few minutes after the strike, a fire truck came, put out the fire, and quickly drove away. Human Rights Watch saw the burned remnants of several military vehicles, but a Houthi guard prevented researchers from entering the area or taking more than three photographs. The residents said that as the fire truck was leaving, another strike hit the multi-story home of the Aqlan family, next to al-Ahmar’s house. The Aqlan family had fled their home after the first strike. About 10 to 15 minutes later, a third strike hit an open yard across the street from both houses destroying a single-story home where 10 people lived, though none were home. The strike also damaged a second single-story building on the property where eight people lived, wounding Walid al-Numais, 17, and four other buildings. Hamran Ghalib Abass, 45, a sweets seller, came outside at 5:30 a.m., about 15 minutes after the strikes. He said he heard his neighbor across the street, Muhammad Munfarih, calling to his son from the gate of his house, telling him to get inside: As they went inside, I heard a plane fly overhead and a whizzing. The pressure [of the explosion] threw me right through the open door of my building. My son came running down, screaming that they had hit our house, which is what he thought because of all of the damage to our house. I heard Munfarih yelling, “Please, someone help!” In fact, the fourth strike had hit Munfarih’s multi-story home, about 260 meters down the street from the al-Ahmar home. The strike killed 18 members of the Munfarih family, including 10 children, and two neighbors, one of them a 13-year-old boy. The strike destroyed the Munfarih house and severely damaged four other multistory houses and one single-story house. Muhammad Abdullah al-Hadrami, 70, the imam of nearby al-Hadaya mosque, said he was standing on the street facing Munfarih’s home when the fourth strike hit. He said that he saw a bright light and then heard people crying out for help. He could not see because of all the dust, so he got onto the ground and crawled toward the house. The first to enter, he saw Munfarih’s wife and daughter-in-law, buried up to their necks. He and other neighbors dug them out. They were the only two family members to survive the blast. Munfarih and other members of his family died in the wreckage of their home before their neighbors could get them to the hospital." ^[+]