"The child died from a sniper's bullet as a result of shelling by militants of a school bus in an-Nauras square near az-Zahraa", the Ikhbariya broadcaster reported citing its correspondent.
Later, the head of the Russian Center for Syria Reconciliation said that a second child died following the sniper attack.
"As a result of the attack, a twelve-year-old boy was killed, while an eight-year-old girl and a teacher accompanying the children were seriously wounded. The girl later died in hospital," Maj. Gen. Viktor Kupchishin said at a news briefing.
"In order to give the greatest resonance to their crimes, the militants turned to inhuman terrorist acts, beginning to cynically and purposefully kill children," Kupchishin stressed.
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The Ikhbariya channel reported that militants opened fire on a school bus on al-Nauras square in al-Zahraa neighbourhood.
However, terrorists still continue to shell Aleppo from the suburbs, killing and injuring civilians, including women and children.