 He went to Malaysia and taught at a religious school in the south of the country in the early 1990s.Indonesian authorities say the school was run by the suspected leaders of the militant Jemaah Islamiah group - Abu Bakar Ba'aysir, the group's spiritual leader, and Riduan Isamuddin, also known as Hambali.On 12 October 2002 two bombs exploded in the Kuta tourist strip on the Indonesian island of Bali, Indonesia.