Thomas Rassloff / EPA A man holds a child in his arms after an airstrike in Aleppo, Syria, on Feb. 3, 2013.

An airstrike by Syrian government forces leveled an apartment building in a rebel-held neighborhood of Aleppo on Sunday, The Associated Press reported.

A statement from the rebel-aligned Aleppo Media Center said at least 20 people were killed in the attack, five of them under the age of 18, according to Paul Watson, a reporter working in Aleppo for The Toronto Star.

Abdullah Al-Yassin / AP People carry a body after a government airstrike hit the neighborhood of Ansari, in Aleppo on Feb. 3, 2013.

Abdullah Al-Yassin / AP A man carries his sister, who was wounded in a government airstrike in Ansari, Aleppo, on Feb. 3, 2013.

Abdullah Al-Yassin / AP A boy holds a bird in his hand that he said was injured in a an airstrike in Ansari, Aleppo on Feb. 3, 2013.

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