Agartala: An unidentified person has issued a death threat to Tripura Chief Minister Manik Sarkar, police said on Friday.

The threat appeared in a Facebook post by one Riya Roy on behalf of the 'World Anti-Communist Council' yesterday which said anybody who will kill Sarkar would be awarded Rs five lakh.

Police have suo motu registered a case, saying the post was suspected to have used a fake name.