The official would not say when and where he was arrested.

"Yes it is confirmed we have arrested him, he is in Pakistan," the official told AFP.

Asked if he was linked to any militant group in Pakistan he said they were investigating.

"Right now he is being interrogated," the official, speaking on condition of anonymity, said.

Indonesian security officials will be given access to him, he added.

"The Indonesians want access to him and they are coming," he said.

Patek, who has a $1million bounty on his head, was the alleged field coordinator for the attacks on night clubs on Bali, which placed mainly Muslim Indonesia on the front lines of the global battle against Islamic militancy.