At the age of 15, Sagar fled Najaf with his family during the massacre which followed the 1991 Shi'a Muslim uprising against Sadaam Hussein. Upon their return, his family found their home destroyed by a rocket, and Sagar was injured by an unexploded bomb as he helped to clear rubble. In 1997, after hearing rumours that his family was in danger, Sagar abandoned his microbiology studies and fled Iraq for Iran with his parents and siblings.