New Delhi: The National Investigation Agency has said accused Tahawwur Rana planned several other plots similar to the 26/11 Mumbai terror attacks to target multiple Indian cities. “His (Rana) prolonged custody has been deemed necessary to facilitate an extensive interrogation aimed at uncovering deeper layers of the conspiracy. We suspect that the tactics used in the Mumbai attacks were intended for execution in other cities as well, prompting investigators to examine whether similar plots were developed elsewhere,” the NIA is believed to have informed the judge, a source said. Rana was brought to the court in a cavalcade including a jail van, an armoured SWAT vehicle and an ambulance. Before Rana was brought to Patiala House Court complex, Delhi Police removed mediapersons and members of the public from its premises, citing security concerns. Police authorities said, “No one would be permitted inside”. A Delhi court recently received the trial records of the Mumbai attacks ahead of Rana’s extradition from the US, a source said. The NIA said that as part of the criminal conspiracy, accused …