Witnesses: Myanmar air attack kills 13, including seven children

Debris and soot cover the floor of a school in Let Yet Kone village in Tabayin township in the Sagaing region of Myanmar (AP)

Government helicopters have attacked a school and village in north-central Myanmar, killing at least 13 people including seven children, a school administrator and an aid worker said.

Civilian casualties often occur in attacks by the military government on pro-democracy insurgents and their allies.