New Delhi, June 7 -- The National Investigation Agency (NIA) said on Saturday that former Trinamool Congress MLA, Saokot Molla, who was arrested on Friday evening, had directed the other accused to make the crude bomb that had exploded in Bhangar near Kolkata in March, just ahead of the West Bengal assembly elections. One person had been killed and several were injured in the blast on March 19. Molla, ex-MLA from Canning Purba assembly constituency, was on the run till now. "He was picked up from West Bengal's South 24 Parganas district following continued searches by NIA as part of its investigation in the case, in which a crude bomb had exploded during manufacturing ahead of the West Bengal assembly elections," the agency said in a statement on Saturday. On his specific role, the agency added that "the former MLA was the key conspirator who had directed the other accused to make the bomb". "Molla had also directed other accused persons to tamper with the scene of the explosion," the agency said. So far, four people have been arrested in the case. The agency said that the accused persons are being examined to ascertain any further conspiracy related to the case, which NIA had taken over from the state police. Earlier, on Thursday, the federal agency had conducted extensive searches at Molla's residence and several other locations linked to him across South 24 Parganas district. Among others arrested include the driver of the four-wheeler used to transport the bomb makers. The blast had occurred in the Bamunia area of Chaltaberia in Bhangar during the manufacturing of a crude bomb. The federal agency is also investigating another case related to recovery of 79 crude bombs in Bhangar area around the same time....