Profile: Abu Dujana

Abu Dujana was arrested in central Java with several others

Abu Dujana is said to have played a major role in a string of deadly attacks in South East Asia.

The self-proclaimed military leader of the militant group Jemaah Islamiah (JI) was arrested in June 2007.

After a lengthy trial, he was found guilty of helping terrorists as well as possessing and storing firearms and ammunition. He was jailed for 15 years.

He is thought to know important information about JI's weapons and logistics.

He is also said to have had weapons training in Afghanistan and met Osama bin Laden.

Islamic teacher

Abu Dujana was sought by police in connection with the 2003 attack on Jakarta's JW Marriott hotel, which killed 12 people, and the attack on the Australian embassy in Jakarta in 2004 which killed 11 people.

He is thought to have emerged as a JI leader after the death in 2005 of bomb-maker Azahari Husin.

There is little definite information about Abu Dujana, as he has been known under many different aliases.

But he is thought to have been born in Java, and is now 37.

He is believed to have taken the name Abu Dujana in the 1980s.

Police believe he travelled to Pakistan, before moving on to Afghanistan, where he received weapons training and fought with the mujahideen.

Like many senior members of JI, he also spent time in Malaysia in the 1990s.

Whilst there, Abu Dujana became a teacher at an Islamic school in Johor, and is thought to have met Mukhlas (also known as Ali Gufron), who is now on death row for his role in the Bali bombings of 2002.

He is also believed to have met - and later provided shelter for - Malaysian-born Noordin Mohamed Top, who is thought to head a militant JI splinter group.

At the time he was arrested, a police spokesman said Abu Dujana had played a major role in "almost all" the bombings in Indonesia.

"He can assemble bombs and he can recruit members," so he is more important than other key terror suspects, including Noordin, he added.