Prosecutors yesterday delivered a 50-page indictment to the West Jakarta District Court where Umar Patek is expected to face trial later this month on six charges related to his suspected involvement in terrorist activities over more than a decade.

Mr Patek, who has allegedly already admitted to a role in the Bali bombings, won't be charged with terrorism offences over the 2002 attacks because Indonesia's tough anti-terrorism laws, introduced in 2003, cannot be applied retrospectively.

But he will face a charge of premeditated mass murder in relation to the bombing of two nightclubs in the popular holiday area of Kuta 10 years ago, as well as a series of bombings of churches in Indonesia in 2000.

If found guilty of the murder charges he could be sentenced to death.

A copy of the indictment also lists charges of conspiracy to commit terrorism, harbouring information on terrorism, possession of explosives and firearms, as well as two counts of document fraud.

Indonesian authorities, including a special counter-terrorism unit with the Attorney-General's Department, have been working on building a watertight case against Mr Patek since his extradition from Pakistan in August last year.

Bambang Suharyadi, one of a team of 15 prosecutors who will be involved in the trial, said yesterday that the indictment covered Mr Patek's alleged involvement in terrorist activities ``from the Christmas bombings up to his arrest in Pakistan''.

The 43-year-old spent almost 10 years at the top of South-East Asia's most-wanted list before his capture in January 2011 in Abbottabad, the same Pakistani town where US forces killed al-Qaeda leader Osama bin Laden last May.

Prosecutors will present evidence from up to 80 witnesses during the trial, including testimony from Australian and American survivors who lived through the horror of the Bali attacks.

They will also rely on evidence already provided by Mr Patek, who in October last year retraced his steps in the final hours before bombs were detonated at the Sari Club and Paddy's Bar.