"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.
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.