Dhaka, Dec. 20 -- UN Human Rights Chief Volker Turk said on Friday that he was profoundly troubled by the killing of Inqilab Mancha leader Sharif Osman Bin Hadi.

In a statement, Turk called for calm and for everyone to refrain from violence."Retaliation and revenge will only deepen divisions and undermine the rights of all," he said."I urge the authorities to conduct a prompt, impartial, thorough and transparent investigation into the attack that led to Hadi's death, and to ensure due process and accountability for those responsible."

Several protests erupted at various locations around the country after Hadi's death was announced on Thursday, six days after he was shot, the statement reads. It notes that some buildings were torched and...