The post appeared a couple of weeks after the Delhi police arrested TN IS module head Khaja Moideen along with his associates in Delhi on January 9. A day earlier, the Tamil Nadu police Q branch had apprehended three men belonging to Bengaluru IS module. When contacted, a senior state police officer said that various teams are working on it and are trying to identify the people behind the post. “It was written in Tamil and it naturally indicates the possibility of a Tamil speaking group behind the threat. The group may not be from Tamil Nadu but it can be from anywhere around the globe. But one thing is definite, the group believes in the IS ideology,” a source noted.