Bangladesh Rifles (BDR) personnel in border outposts and camps have been put on high alert so that the two JMB Majlish-e-Shura members still at large cannot flee across the border. The law enforcers, particularly the Rapid Action Battalion (Rab), yesterday continued their hunt for the two fleeing leaders of the banned Jamaatul Mujahideen Bangladesh (JMB)-- Khaled Saifullah and Salahuddin.As part of the ongoing drive against the militants, police and detectives carried out a massive overnight raid on the Housing Estate in Comilla town yesterday. But it failed to arrest any member of the militant outfit or recover any explosives or firearms. During the five-hour raid in the early hours, the law enforcers picked up 33 people for quizzing. Meanwhile, interrogators continued quizzing the detained militant top brass including JMB supremo Abdur Rahman and his second-in-command Siddiqul Islam alias Bangla Bhai at the Taskforce for Interrogation (TFI) office. "Our interrogation is currently focused on potential stocks of explosives and whereabouts of the Shura members who are yet to be arrested," MA Aziz Sarkar, director general of Rab, told The Daily Star yesterday.