South Dinajpur, Oct 11 (ANI): India's paramilitary Border Security Force (BSF) detained nine Bangladeshi nationals on Saturday near the Indo-Bangladesh international border in a bid to check infiltration. BSF has tightened security in areas bordering Bangladesh in wake of bomb blast in Burdwan district in West Bengal. Two women have been arrested in connection with the explosion that left two suspected militants dead on Sunday. Police is probing the possible involvement of militant outfits like Lashkar-e-Taiba and Harkat-ul Jihad al-Islami in the blast. BSF Commandant Sangram Bisal said that due to close vigilance after the blast in Burdwan they arrested the Bangladeshi nationals who were crossing the hills.