KOLKATA: In the aftermath of the car bomb blast in Delhi, Kolkata Police has began special surveillance in the city. The police are trying to identify citizens of Bangladesh, Pakistan and Afghanistan, who have not returned to their home countries even after the expiry of their visas.
Police sources on Thursday said that officers are now looking into whether any residents of these three countries are hiding somewhere in Kolkata or in the far-flung districts.
At the same time, the detectives of Kolkata Police and the state have also started investigating the old sleeper cells of various militant organisations. The city police headquarters have alerted the officers in this regard after the Delhi bomb blast which claimed 12 lives.