In a statement released on Tuesday, UN spokesman Stephane Dujarric said, “The Secretary-General [Ban Ki-moon] calls for a prompt, effective and impartial investigation in order to ensure accountability.”
The UN chief also urges “all parties to the conflict in Yemen to immediately cease all operations, including airstrikes,” Dujarric added.
The hospital, located in the Heedan district of Yemen's northwestern province of Sa’adah, came under attack on Monday night.
The medical center was reportedly run with support from the UN Children's Fund and the World Health Organization.
Hassan Boucenine, the MSF head of mission in Yemen, said the Saudi airstrikes hit the hospital several times, leaving the facility wrecked and two staff members lightly wounded by flying debris, Press TV reported.
“It could be a mistake, but the fact of the matter is it's a war crime. There's no reason to target a hospital,” Boucenine added.