The U.N. human rights office (OHCHR) Tuesday expressed concern over airstrikes Monday in Syria that hit at least four hospitals and a school, reportedly killing more than 45 people and injuring dozens of others. "We are gravely concerned about these abhorrent and repeated attacks on medical facilities in the Syrian conflict," OHCHR spokesperson Rupert Colville told reporters in Geneva. Colville said that in Maarat al-Numan, in Idlib Governorate, two hospitals were attacked, including one supported by Medicins Sans Frontieres (MSF or Doctors Without Borders), which was reportedly hit by four missiles, allegedly killing nine people and injuring 30 others. The National Hospital in Maarat al-Numan also was hit, with three people reported killed and six injured.