UNITED NATIONS, July 31, /ITAR-TASS/. U.N. Secretary-General Ban Ki-moon has demanded those to be responsible for the attack on a U.N. school in Gaza be held to account.

He condemned the Israeli strike on the school that killed 16 people, including children.

“It is unjustifiable, and demands accountability and justice,” Ban Ki-moon said.

The strike came after the Israeli army said it was observing a humanitarian truce.