India, Feb. 11 -- D elhi fans of actor Kartik Aaryan got a special surprise on Monday when the actor was spotted at Laxmi Nagar Metro Station, filming for his upcoming movie Naagzilla. Videos from the shoot quickly went viral on social media, and we now have exclusive details on the team's activities. A source reveals that the shoot has been ongoing for the past four days. "The schedule in the Capital is likely to continue for over a week. So far, the team has filmed at Yamuna Ghat for a key scene, followed by Sector 54 in Dwarka. Dilli Haat in Pitampura has also served as a primary location," the source adds. Security on set is extremely tight, with phones strictly prohibited during filming. Directed by Mrighdeep Singh Lamba, Naagzilla is being planned as a trilogy....