According to Dr. Tin Wa (Past Captain and Gold of RUBC), his father U Tin Ohn and U Ohn Maung — both Cabinet Secretaries— were in a room near the Cabinet Meeting Room in Secretariat on July 19, 1947.

U Ohn Maung was requested by Bogyoke Aung San to make a presentation after the main Meeting.

He became an Arzani.

He perished along with seven Martyrs on July 19. Sao San Tun was hospitalized and passed away on July 20.