The leader of South-east Asian terror group Jemaah Islamiah (JI) was sentenced to seven years' jail yesterday by an Indonesian court for inciting others to commit an act of terrorism.

Para Wijayanto, 56, was named as the emir of JI in 2009.

Prosecutors said he was instrumental in recruiting, training and raising funds for Indonesian militants who went to Syria between 2012 and 2018 to fight alongside those opposed to the regime of President Bashar al-Assad.

Wijayanto and his wife were arrested on the outskirts of Jakarta in July last year.

"The defendant purposely incited others to commit terrorism," presiding judge Alex Adam Faisal said in a hearing room at East Jakarta's district court.

Wijayanto was not in court for the verdict but followed proceedings through video-conferencing from a lock-up at a Jakarta police station.

The judge, who described him as being educated, knowledgeable and having good communication skills, stressed that JI was banned by the Indonesian government.

The JI network - which is affiliated to terror group Al-Qaeda - was behind the most deadly terror attack in the country with the Bali bombings in 2002, which killed more than 200 people, many of whom were foreigners.

Prosecutors said Wijayanto, also known as Abu Faiz, sent two fellow militants, Patria and Askary, to Syria in 2012 to establish contact with the Free Syrian Army and Jabhat al-Nusra, a terror organisation fighting government forces in the Syrian civil war.

Both militants were tasked with evaluating and mapping out possible routes for other Indonesian militants to travel to Syria.

It is not known how many Indonesian militants were eventually sent to the war-torn country.

The objective, said prosecutors, was for those militants to eventually return to Indonesia and use their war experience to establish an Islamic state at home.

"The defendant... had wished to proclaim an Islamic state based on syariah law in a region where the people accept Islam as the national principle... and to expand the territory worldwide... and to free any country under the control of infidels," the indictment read.

"With such a plan, JI would some day want to create chaos in Indonesia that would in turn induce fear and insecurity among the general public."

Police believe that JI has been reconstituted and are calling it "Neo-JI" as it recruits members for a caliphate in Indonesia, former police spokesman Dedi Prasetyo said last year.

Security agencies say the original JI was decimated in Indonesia following a series of operations, but counter-terrorism experts warned that young militants are still being recruited and the terror network may have expanded in the country to a 2,000-strong force.

"Neo-JI" was coined to describe this new threat.

Under Wijayanto's leadership, JI was active in courting local clerics and setting up Islamic boarding schools.

It was also running businesses to raise funds while providing entrepreneurship training for members.