Explosives (probably RDX) in the seven trains were planted at Churchgate, the originating station. “After planting bombs, the terrorists would’ve got down at next station,” says an official
Timer devices
Intelligence agencies think bombs were planted at same time and triggered in a series using a timer device. Operation may have been carried out by a group of 8-10 people
LeT suspected
While the Lashkar-e-Tayyeba is the chief suspect, officials feel the outfit involved a frontal organisation (like the Al Badr) to execute the plan
SIMI too?
Police also trying to identify “local sympathisers” of banned outfit SIMI whose ex-cadre are known to be active in Aurangabad, Malegaon, Bheed areas