Police believe planning for the bombings was led by Noordin Mohammad Top, who also involved in the 2005 Palu market bombing. The first meeting had been held on 30 April. Ibrohim, a florist who worked for a florist company which had stores in both the bombed hotels, was another key organiser. Ibrohim was recruited in 2000 by Saifudin Jaelani, his brother-in-law, while he was working as a florist at the Hotel Mulia in Jakarta. In 2005, Ibrohim and Jaelani were inaugurated as members of Noordin's special forces. Ibrohim set strategies, conducted surveys of the locations and smuggled the bombs into the hotels. Saifudin Jaelani is believed to have also recruited the suicide bombers for the operation.
