Indonesian police have arrested six suspected Islamic State (IS) supporters, who have been accused of preparing terror attacks for later this month.
In a series of raids across the island of Java, Indonesia's special anti-terror unit uncovered bomb-making materials and a black IS-style flag.
Those arrested included a teacher at an Islamic school and one of his students.
National police chief Badrodin Haiti said anti-terror police from Unit Densus 88 acted after information received from the Australian Federal Police and the Federal Bureau of Investigation.
He said the men appeared to have prepared imminent attacks in Java and Sumatra.
The first arrest was made on Friday in the West Java city of Banjar.
That led to more raids across Java, including one on Saturday night in central Java, where police said they found bomb-making materials including fertiliser, ball bearings, nails and electronic switches.
Police would not say where attacks appeared to be intended but said they had found a map of greater Jakarta with the bomb-making materials.