Suspects accused of planting the bombs include Zougam and Abdelmajid Bouchar.
The Soviet Union exploded more than 40 bombs, including a 58-megaton weapon.
It gives an account of the expenditure of bombs, including chemical bombs, by Iraq in the Iraq-Iran War.
There was a constant stream of rumors about more bombs, including in Philadelphia.
They confiscated material for making bombs, including four timing devices, Mr. Rubalcaba said.
In November six bombs, including some on cycles, killed 13 people in courts in Uttar Pradesh, a northern state.
But many producers and stockpilers of cluster bombs (including China, Russia and the United States) decided not to sign the convention.
Georgia and Russia have not adopted the convention, nor have many of the heaviest users of cluster bombs, including the United States and Israel.
American warplanes, in turn, have dropped an ever expanding tonnage of bombs, including two "daisy cutters," which are 15,000 pound bombs.
The fighters also said they had learned many ways to explode their bombs, including via a direct electrical wire connection or remotely via a radio or cellphone signal.
