On 15 April 2011, a suicide bomber blew himself inside a crowded Mosque at a Police station in Cirebon, West Java, injuring 28 persons mostly Police officers who were having their Friday prayer.
According to MetroTV, this is not the first time that the bomber, later identified as Muhammad Syarief, appeared in public. TV stations show that Syarief have participated in various demonstrations including beating a vehicle of the local Prosecutors office in Cirebon.
Further, The Jakarta Globe reported that Syarief was suspected of killing an army officer i.e First Corporal Sutejo, and stabbed his friend Ali, in early April, because they heard him taking about the suicide bombing plan. Besides, he was also suspected of being involved in the destruction of a mini market.
The Police is still investigating the suicide bombing case, among others by raiding the houses of Syarief's parents, his brother, and his father in law.
The suicide bomb blasted exactly one month after the first Book Bomb exploded at Utan Kayu, East Jakarta on 15 March 2011, that caused a Police officer to lost his right arm. Unfortunately, until this moment the Police still unable to name a suspect responsible for the delivery of Book Bombs to certain public figures in various parts of Jakarta.
Considering that Muhammad Syarief was active in several public protests, destruction of mini market and suspected of killing an Army officer, I felt that it was very weird that he was able to enter the Police's Mosque without being noticed.
Under normal circumstances, a man with such reputation should have bein in the Police's Most Wanted Person List and monitored very closely by the intelligence network.