On Republic Day, a high alert was sounded in Dehradun after a suspicious man was spotted in the vicinity. Police has also been instructed to remain on toes.
According to reports, a group of six to seven people have probably got into the city and might execute a terror attack.
A CCTV image of one of them has also been released by the Uttarakhand Police and people have been asked to contact the cops if they spot the person.
The Local Intelligence Unit and the police teams are searching the 'suspicious' man.
The step comes next to the arrests made by a joint police team of Uttarakhand and Delhi on January 14.
Four youths- Ahlkaq-ur-Rehman, Mohamad Osama, Mohammad Azim and Mohammad Meraj- were arrested from different areas of Roorkee I adjoining Haridwar district.
They had the plan to blow up a rail track during the ongoing Ardh-Kumbh. Over 5 crore pilgrims are expected to visit Haridwar during the four-month long Ardh-Kumbh, which started on January 1.