Farouk Arnaz – Police suspect that the small bomb that exploded in Bogor on Friday is linked to the recent book-bomb threats despite the packaging being different.

Chief Comr. Boy Rafli Amar said the bomb "must have been built by an expert". "It has same characteristics as what we have seen in the previous bombs in conflict areas," he said, refering to Poso, Central Sulawesi, which saw sectarian conflicts in 2006 with the involvement of Jemaah Islamiyah.

The bomb on Friday was found in Kota Wisata complex wrapped inside a box on Friday morning around 9.30 a.m. On the box was writing saying "Ini Bom" ("This is a bomb") and "Allahu Akabar" ("God is great"). Police on the scene believe it could have been activated by a timer, or a "chemical process inside the bomb," Boy said

The previous bombs, described as booby trap bombs, were hidden inside thick books and were designed to explode once the book was opened. The book bombs also had specifically identified targets, unlike this one.

"We don't know who this bomb was sent to, but we do know that there was no book inside," Boy said.

Boy declined to comment when asked whether the bomb was intended for President Susilo Bambang Yudhoyono's private house in Cikeas, Cibubur, which is located just 2 kilometers from where the bomb exploded.