The Head of the Public Information Section of the National Police, Kombes Pol. Martinus Sitompul, emphasized that the issue of the throwing of the holy book of the Koran by the guard at the Mako Brimob Rutan Salemba Branch, Central Jakarta on Friday, was not true.

"It is not true that the Koran was thrown by the guard," said Kombes Martinus in a text message, Friday night.

Martinus explained that what happened was that the guard checked a number of books and objects in the detention cell.

According to him, the riot that occurred on Friday afternoon was triggered by the inmates who did not accept the officers' search of their rooms.

"The turmoil that occurred was a reaction to the actions taken by guard officers who confiscated cell phones belonging to Block C detainees," he said.

During the search, four cell phones belonging to four terrorist convicts were found, namely Juhanda, Saulihun, Khairul Anam and Jumali.

A number of angry Block B and Block C inmates then broke the cell door.

Not only that, a number of facilities at the Salemba detention center were also damaged, including the gates of Block B and Block C hallways and their windows.

Martinus added that the condition of the prison is now back to being conducive. "The detention center is conducive and the prisoners are calm," he said