JAKARTA - INDONESIAN prosecutors demanded 15 years jail on Thursday for three Islamists alleged to be part of militant cell that killed a priest and plotted attacks on Christians and foreigners.

Defendants Agustyawarman, Heri Purwanto and Sugianto are among 10 suspects arrested in Palembang, South Sumatra who were part of an alleged cell of the Jemaah Islamiyah (JI) network.

Prosecutor Firmansyah told the South Jakarta district court the men were 'guilty of acts of terror' and admitted to making bombs for use in attacks and transferring them between JI safehouses.

Purwanto was involved in the 2007 murder of Christian teacher Dago Simamora and also an attack on Christian priest Yosua Winardi with a hammer, Firmansyah said.

Both Purwanto and Agustyawarman plotted attacks on other priests, he said.

Agustyawarman was also involved in a plan to bomb a backpacker cafe on Sumatra island in 2006 which was aborted on fears of Muslim casualties, Firmansyah said.

Singaporean Mohammad Hasan bin Saynudin, the self-confessed leader of the cell, told the court previously that he had met Osama bin Laden in Afghanistan and had planned to bomb Singapore's Changi airport. -- AFP