UNITED NATIONS, March 31 -- UN Secretary-General Ban Ki-moon on Tuesday called on all parties involved in military operations in Yemen to ensure the protection of civilians.

Ban voiced his deep concern about reports of numerous civilian casualties resulting from ongoing military operations in Yemen, which have left dozens dead and many more injured, among them children, according to a statement issued here by his spokesperson.

"The Secretary-General reminds all parties involved in military operations in Yemen of their obligations under international humanitarian law to ensure the protection of civilians. This includes the strict adherence to the principles of proportionality, distinction, and precaution," the statement said.

Ban also stressed that hospitals and other medical installations have a special protected status under international law.

"The Secretary-General reiterates his firm belief in the necessity to resolve the conflict through peaceful means," said the statement.

Fighting has been ongoing in Yemen since Jan. 22, when the legitimate government under President Abd-Rabbu Mansour Hadi was ousted by Shiite Houthi forces, provoking the recent military campaign by a coalition of 10 countries lead by Saudi Arabia.

The air raids, which target the Houthis in Yemen, have left 83 people killed and about 350 others injured across the country. The attacks include an airstrike on the al-Mazrak refugee camp in Haradh in the north of Yemen, and attacks against several hospitals in Dhale, in the south.