According to Mwatana for Human Rights: "Attacks on Hospitals [...] On Friday, 27 April 2018, at about 10:30 pm, Saudi/UAE-led Coalition aircraft bombed the National Center for Blood Transfusion and Research on the campus of 70 St. Hospital in Al Sabeen district of the Capital Secretariat (Sana’a). The bomb did not detonate, but it went through the roof of the building and the concrete floor, destroying the water network. The rising water levels caused an electrical malfunction, which destroyed a number of medical machines and equipment. The Center was rendered partially in operational. The center’s operations resumed completely four days after the airstrike. The center provides medical services to 2,000 to 2,900 cases every month, according to the Center’s manager." ^[+]