Indonesian police say they have arrested at least seven suspected militants from the Muslim group accused of carrying out last year's Bali bombings.
The terror suspect known as Hambali remains at large
Police also found large amounts of ammunition and enough chemicals and explosives for several Bali-style attacks.
One militant died in police custody. Police said the man, who was hand-cuffed, grabbed a M-16 rifle, loaded a magazine and ran to a toilet where he shot himself in the chest.
Police spokesman Edward Aritonang told reporters the arrested men were members of militant group Jemaah Islamiah (JI).
However, he dismissed media speculation that one of the detainees was Riduan Isamuddin, also known as Hambali.
Hambali, described as Asia's most wanted man, is thought to be one of JI's most senior leaders and its chief link with Osama bin Laden's al-Qaeda network.
"I want to clarify that there has been no arrest of Hambali by staff from police headquarters or other police institutions. We are indeed looking for him, but he is not caught yet," Mr Aritonang said.
INDONESIA'S TERROR TRIALS
Trial began on 12 May
Accused of providing the van and bombs used in the attacks.
Trial began on 2 June
Accused of planning the attacks.
Mukhlas (Ali Gufron)
Trial began on 16 June
Accused of being the 'mastermind' behind the attacks
Also said to be operations chief of regional militant group Jemaah Islamiah (JI).
Abu Bakar Ba'asyir
On trial for series of church bombings in 2000.
Often linked to Bali bombings as he is accused of being JI's spiritual leader
Police in Jakarta and Semarang, central Java, seized two M-16 rifles, 22,000 rounds of ammunition, TNT and potassium chlorate, as well as detonators and bomb-making manuals.
Three men were detained in Jakarta, including an alleged JI leader Pranata Yuda, 42.
Police said another man, Ichwanudin, 28, shot himself in detention.
"He indeed killed himself," Jakarta police chief Makbul
Padmanegara told reporters.
Before the latest detentions, police had arrested more than 30 people since the Bali bombings in October 2002 killed more than 200 people.
The chief suspects are now on trial.
On Thursday, Indonesian prosecutors alleged the Bali bombers followed a call from Osama Bin Laden to attack Western interests.
Prosecutors read a statement from another suspected militant, Wan Min Wan Mat, who is detained in Malaysia, which said the bombings were intended as a "warning for foreigners - Americans and Australians who are setting their feet in Bali and who are infidels and enemies of Islam".
Jemaah Islamiah is alleged to want to establish an Islamic state incorporating Indonesia, Malaysia, Singapore, and parts of the Philippines and Thailand.
Its alleged spiritual head, cleric Abu Bakar Ba'asyir, is separately on trial in Jakarta accused of planning bombings and of trying to topple the government.