DHAKA: At least 33 people were killed and several others injured when Syrian military airstrikes hit parts of northwest Syrian city of Aleppo Thursday, said the UK-based opposition group Syrian Observatory for Human Rights.

Of the airstrikes one hit a school in Aleppo killed 20 people, including 17 children, when the teachers and students were preparing an exhibit of children's drawings depicting Syria at war.

A day earlier, Syrian forces dropped barrel bombs on an opposition-held area of Aleppo, killing 25 children, reports CNN quoting an opposition Local Coordination Committees of Syria.

Last week, another airstrikes struck a crowded vegetable market in the opposition-held town of Atareb in Aleppo province, killing at least 30 people and wounding many others.

The main, Western-backed Syrian opposition group, the Syrian National Coalition, condemned Thursday's attack.

BDST: 1352 HRS MAY 02, 2014