KEY POINTS:
Indonesian police may have captured one of Indonesia's prime terror suspects, wanted for helping protect Bali bombings mastermind Noordin Mohammed Top.
Indonesian officers from the Detachment 88 anti-terror squad, which Australia helped set up after the Bali bombings, killed one terror suspect and injured another during the ambush on a Yogyakarta street last night.
The men are believed to be members of the network of prime terror suspect Abu Dujanah, wanted for helping protect Noordin Top - Indonesia's most wanted terrorist.
Noordin Top is blamed for sourcing the bombers and materials used in both the 2002 and 2005 Bali bombings.
It was unclear whether Dujanah, also known as Ainul Bahri, was among those involved in the shootout in front of a shop in the Depok sub-district of Yogyakarta, about 7pm (2300 AEDT) yesterday.
However, Indonesia's Metro TV reported Dujanah, from west Java, was one of six people were arrested.
"This is Abu Dujanah's network," National Police Chief spokesman Sisno Adiwinoto told AAP.
"We are still checking the field because the Detachment 88 officers cannot be contacted yet.
"There are some suspects, but they are Dujanah's network.
"The Detachment 88 is still chasing the rest of the group."
Members of the Detachment 88 squad are combing the crime scene, along with officers from the bomb squad, mobile police brigade and Yogyakarta forensic police.
Adiwinoto said two empty bullet casings were recovered from the scene.
He said two suspects were shot, one fatally.
"The rest were taken by Detachment 88 to chase the others," he said.
Indonesian newspaper Indo Pos said police also seized three motorbikes.
One witness, a mobile phone voucher salesman Asnawiyah, said he heard two shots yesterday evening.
"It was very fast," he told Indo Pos.
"At that time I heard two shots, one got hit."
- AAP