Tabish Nasser Siddiqui, the first person arrested by the NIA in an ISIS-linked terror case, had been operating out of a society right behind the Anti-Terrorist Squad’s headquarters at Nagpada in south Mumbai, officers said on Tuesday. Although officers found in his possession videos on making DIY weapons, his family claimed Tabish is mentally unwell. NIA made the arrest after receiving information from the home ministry.

The National Investigation Agency (NIA) made the arrest after receiving information from the home ministry about Siddiqui, 34, having incriminating material related to ISIS and that he was in touch with his handlers. On June 28, the NIA raided his rented flat in Hirji Govindji apartments located near Nagpada Police Hospital, right behind the headquarters of the Anti-Terrorist Squad (ATS).