A SECURITY incident is unfolding at a courtroom in Indonesia where a Muslim cleric, suspected of founding the group blamed for the Surabaya bombings, is facing the death penalty.

Aman Abdurrahman, the alleged founder of Jemaah Ansharut Daulah (JAD), is facing court over the 2016 Jakarta bombing.

ABC reporter David Lipson has reported a blast has been heard outside the courtroom.

More to come.