At least 43 children have been killed by armed forces in Myanmar since February's military coup, according to rights organisation Save the Children.
The group said the South East Asian country was in a "nightmare situation", with the youngest known victim just six years old.
A local monitoring group puts the overall death toll at 536.
Meanwhile, ousted leader Aung San Suu Kyi has been charged with violating the country's official secrets act.
Ms Suu Kyi, along with four of her allies, were charged last week, but the alleged crime - which carries a prison term of up to 14 years - has only now come to light.
The new charge against Ms Suu Kyi is in addition to earlier charges of possessing illegal walkie-talkies, violating Covid-19 restrictions during last year's election campaign, and publishing information that may "cause fear or alarm".