Assam Chief Minister Himanta Biswa Sarma took a dig at RJD candidate Osama Shahab, son of late gangster-politician Mohammad Shahabuddin, comparing him to terrorist Osama bin Laden during a Bihar rally. Osama, contesting from Raghunathpur, faces several criminal cases. His candidacy has stirred controversy ahead of Bihar's two-phase polls on November 6 and 11.