Two leaders of the feared Southeast Asian terror network Jemaah Islamiyah have been sentenced to 15 years in jail, dealing yet another blow to the group blamed for a string of deadly bombings in Indonesia.

Abu Dujana, the group's military commander, and Zarkasih, who acted briefly as its caretaker leader, were found guilty April 21 of conspiracy to commit terrorist attacks, harboring fugitives and stockpiling illegal arms.

Jemaah Islamiyah and its allies are accused of carrying out the 2002 bombings on Indonesia's resort island Bali, a 2003 attack on the J.W. Marriott Hotel in Jakarta, a 2004 attack on the Australian Embassy in Jakarta, and 2005 triple suicide bombings on restaurants in Bali.