Police's Special Branch (SB) recently submitted a report to the home ministry saying a certain group was planning subversive and terror activities to "free war criminals now under trial", the Daily Star newspaper reported today quoting unidentified sources.
The report said the group might hijack a plane on international or domestic routes, abduct or kill any VIP and stage blasts to commit atrocities as it was wants to "tarnish the image of the nation by creating anarchy and degrading law and order in the country".
The apex court had earlier upheld their capital punishment originally handed down by a special Bangladeshi tribunal for crimes against humanity they had committed during the 1971 Liberation War, siding with the Pakistani troops.
Bangladesh has witnessed a series of systematic attacks in the recent past that left nine people including two foreigners dead and nearly 100 wounded.
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In subsequent days, a moderate Sufi saint and state-run Power Development Board's former chief Khizir Khan, progressive book publisher Faisal Arefin Dipon, two on duty policemen and aide of a Muslim Sufi shrine were murdered.
Security analysts said the pattern of the attacks suggested the assailants targeted law enforcement or security agency members, secular writers and bloggers and moderate Muslim Sufis who were opposed to Islamists or religious extremism apart from the foreigners.