The gunman killed his mother at the home they shared before driving to the school in her car and opening fire. Reports say the guns used in the attacks were registered to her.
If the constitution passes, elections must take place within three months and the deep polarisation in the country is likely to continue, the BBC's Bethany Bell in Cairo reports.
State media reports of the results following Saturday's second and final round of the referendum suggest that some 63% of voters had backed the charter. Turnout was low, estimated at 30%.
Diplomats have routinely expressed concern about the safety of Burma's domestic airlines, which have been unable to modernise their fleets because of sanctions, and whose safety checks are not published, the BBC's south-east Asia correspondent Jonathan Head reports.
So Germany seems to be entering a legal grey area - it is not clear when the flight of a drone may become so extensive that the wider authorities need to intervene, Stephen Evans reports.
