"There were at least 68 attacks on schools in Syria (in 2014), which killed at least 160 children and injured 343," the UN Children's Fund (UNICEF) spokesman, Christophe Boulierac, told a news briefing in the Swiss city of Geneva on Tuesday.
"It is very probable that this is an underestimate," he added.
Boulierac noted that the education of between 1.3 and 1.6 million children in Syria has been cut short due to the foreign-backed militancy.
The UN official said an estimated 670,000 children in Syria are being deprived of education after the ISIL Takfiri terrorists ordered schools in Raqqa and Deir ez-Zor provinces as well as some areas in the northwestern province of Aleppo shut in November 2014, pending a revision of the curriculum.