New Delhi, April 30 -- The National Investigation Agency (NIA) is interrogating several individuals including pony operators, vendors, photographers and those employed in adventure sports activities to recreate the sequence of events as well as establish if they were involved in any way in the April 22 terror attack in Pahalgam, people familiar with the development said on Tuesday.

Among those interrogated was the zipline operator at Baisaran meadow, who was heard chanting "Allahu Akbar" even as the attack began in a video shot by a tourist that surfaced on Monday. Several so-called overground workers (OGWs), those offering logistical support to terrorists, are also being questioned to find out their possible role in reconnaissance, shel...