The airstrike on Tuesday was carried out against an area in the small town of Pazigyi in the middle of the country. The target of the bombing raids was a ceremony where locals had gathered to mark discontent with the military junta's rule.
The information comes from a local democracy group and from witnesses who say that fighter jets attacked in the morning in connection with the opening of a pro-democracy center.
The bombs were dropped just over the crowd, followed by a helicopter attack half an hour after the air raid.
According to initial data, the number of fatalities was estimated at around 50, but the number rose steeply during the day, doubling according to local sources in the evening local time.
Many victims are feared to be children
Military dictatorship was imposed in connection with the February 2021 coup that overthrew Aung San Suu Kyi's elected government. Widespread protests have been violently suppressed by the military junta, and more than 3,000 Myanmar civilians have been killed by security forces, according to independent estimates by Human Rights Watch, among others.
Many of the victims of Tuesday's attack in Pazigyi were children, according to witnesses.
The region of Sagaing and the city of the same name are located about 24 kilometers north of the capital Naypyidaw.