UN Secretary-General Ban Ki-moon on Friday strongly condemned the reported attack on a school in the western part of Syria's Aleppo city that killed a number of children.

"Such attacks, if deliberate, may amount to war crimes," UN spokesman Stephane Dujarric said while reading a statement to reporters here.

"Those responsible for these acts must be brought to justice," Dujarric said. "The secretary-general reiterates his call on the Security Council to refer the situation in Syria to the International Criminal Court."

The attack, which reportedly left several children dead, came a day after the spokesman issued a statement saying the UN chief was "appalled" by reports of attacks that killed students and teachers in a school complex in Haas village, Idlib governorate, Syria on Oct. 26.

In the previous statement, the secretary-general called for "an immediate and impartial investigation" of that and other similar attacks against civilians in Syria.