The reaction came a day after Choudhury Muenuddin in an interview with the Al Jazeera declined to appear before the Bangladeshi war crimes tribunal saying "the tribunal in Bangladesh is a joke, its a sham trial."
"Choudhury Mueenuddin himself is an accused who is wanted particularly for the systematic killings of top intellectuals just ahead of the December 16, 1971 victory against Pakistan. Don't you think it is natural on his part to make such claims about the trial," attorney general Mahbubey Alam told PTI.
"We know one of them (Mueenuddin) is living in Britain and the other is in the United States. We will do all we can to return them home to be exposed to justice," a foreign ministry spokesman told PTI.
Mueenuddin also denied involvement in "any criminal activities of any nature" in the 1971 liberation war or since, saying, "In fact, I was not even a supporter of military action and I resigned my political posts after the military crackdown."
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The prosecution lawyers said they had gathered specific evidence that Mueenuddin played a crucial role in the massacre of intellectuals opposed to the Islamists on December 14, 1971 just before the war ended while archival media documents revealed that he had acted like a secret killer.
The International Crimes Tribunal (ICT-2) on June 24 indicted Mueenuddin and Khan on 11 counts of 'crimes against humanity' committed during the war.
The tribunals have already handed down death penalty to four top Jamaat leaders and life imprisonment to two others triggering violence across the country that claimed over 150 lives since the first sentence was awarded in January this year.