The Coimbatore Police is on alert following a tip-off from Central and state intelligence agencies over certain terror elements regrouping in Coimbatore District in Tamil Nadu, latestly.com reports on June 5.The Police are on the lookout for certain former leaders and cadres of a banned Islamist organization trying to coordinate some people in the District. Sources stated that the police are keeping vigil on the movement of vehicles into the town and all the check posts from Kerala's Palakkad District are monitored and vehicle checks conducted.