Two "highly radicalised" Bangladeshi nationals, allegedly involved in propagating 'Jihad' in India by posting hateful and incriminating materials online, were arrested from Bhopal in Madhya Pradesh, a NIA spokesperson said on Monday. Hamidullah alias 'Raju Gaji' of Narayanganj district and Mohammad Sahadat Hussain alias "Abidullah" of Madaripur district in Bangladesh were arrested on Sunday.