Dhaka, Jan. 3 -- Uncertainty over the whereabouts of Faisal Karim Masud, the prime suspect in the killing of Sharif Osman bin Hadi, has intensified after three video messages surfaced on social media in quick succession.

In the videos, Faisal denies any involvement in Hadi's murder and claims that he has been in Dubai since the killing. He also displays what he says is his multiple-entry Dubai visa to support the claim.

Police, however, have consistently maintained that Faisal fled to India with his associate Alamgir Sheikh through the Haluaghat border in Mymensingh shortly after the killing.

Several people have been arrested on suspicion of helping Faisal escape, including the driver of a hired vehicle allegedly used to take him to th...