A written statement by the group said 10,913 children, 2,305 of whom where younger than 10 were killed during the operations by Assad regime in Syria. 3,399 femalechildren lost their lives, the statement added.
Syrian Network for Human Rights also said that there were 9,000 children younger than 18 in prisons in Syria and 79 children lost their lives under torture.
It also said that 88 percent of those who were killed in Syria were civilians and this was the greatest massacre that targetted civilians since the World War II.
According to the network, most children were killed in cities of Aleppo, Homs and Idlib and in Damascus suburbs.