A man who allegedly helped to plot the bombings on the island of Bali in 2002 has been extradited to Indonesia from Pakistan

Umar Patek, who was arrested in northern Pakistan in January of this year, will likely face murder charges in a Jakarta court. He is believed to be the only principal suspect in the case who has not been arrested, jailed or killed.

He faces the death penalty if convicted.

"[However], he cannot be prosecuted under the anti-terrorism law because it cannot be imposed retroactively," said Ansyaad Mbai, head of the Anti-Terrorism Agency, according to BBC.

"[But] he is a murderer and bombmaker, which also breaches the criminal code. It's now up to the investigators."

The Bali attacks killed 202 people, including 88 Australians, 38 Indonesians and 28 Britons, who flocked to the island paradise. Patek was linked to the Jemaah Islamiah (JI) terrorist group, which was blamed for the bombings. Patek allegedly worked in concert with a man named Dulmatin, the mastermind of the Bali disaster, who was shot to death by Indonesian police in 2010.

In addition to Bali, Patek is believed to be involved with three other attacks in Indonesia and reportedly has connection with militants in the Philippines and al-Qaeda operatives in other part of Asia.

According to BBC, Indonesia officials hope to learn from Patek details of links between terror cells in Pakistan and Southeast Asia.

JI seeks to establish an Islamic state in Indonesia and in other regions of South East Asia.