Abu Dujana (/ˈɑːbuː duːˈdʒɑːnə/ ⓘ AH-boo doo-JAH-nə; born Ainul Bahri in Cianjur, West Java, 1968)[1] was the military leader of Jemaah Islamiah from 2005 until June 2007 when he was arrested.
He has also spent time in Malaysia in the 1990s where he taught at an Islamic school in Johor and met Ali Ghufron who was involved in the 2002 Bali bombings.
He headed JI's military wing and was capable of assembling bomb and recruiting members.
He has allegedly procured and kept two caches of explosives for attacks against Christians and government workers in Poso, Central Sulawesi, Indonesia.
He is on trial on anti-terrorism charges including plotting terrorist activities and sheltering the perpetrators of the Bali bombings.