Key points: - Junta forces arrived in two transport helicopters while two attack helicopters fired on the school, a new report says - The investigation says when junta forces left they took up to 20 people along with the bodies of the dead children - The junta says the school was being used by terrorists, who used villagers as human shields during the attack Warning: This story contains descriptions of graphic violence that may distress some readers.The junta has acknowledged that two army helicopters shot at a school in the village of Let Yet Kone in the Tabayin township in the central Sagaing region in September.According to Myanmar Witness, the school, which had more than 240 pupils and was housed in a monastery building, was attacked in the afternoon of September 16 by junta forces that arrived in four, Russian-made helicopters.While about 80 junta soldiers raided the village, two Mi-35 attack helicopters fired Soviet-developed S-5 ground attack rockets on the school.After the attack, which lasted about an hour, junta forces took away between 15 and 20 people and also removed the corpses of the child victims, the investigation found."