New Delhi, Nov. 17 -- With confirmation that 35-year-old MBBS doctor from Jammu and Kashmir, Umar Un Nabi, who executed the deadly car blast outside Red Fort on Monday evening, was using two mobile phones, teams investigating the blast case and another related case to probe a "larger conspiracy" behind the terror attack are now trying to recover his cellphones that could lead them to key conspirators and unravel their pan-India terror strikes plan, police officials privy to the cases said. A CCTV footage that surfaced on Saturday showed Umar sitting inside a shop in Haryana's Dhauj with a bag and two mobile phones on October 30. He was seen in the footage giving one mobile phone to a person at the shop reportedly for charging while the other phone remained with him. The police are trying for CCTV footage that could show Nabi with the mobile phone between the night of November 9 and November 10 evening, when the blast happened. Investigators suspect that Nabi either dumped the phones somewhere while driving the white Hyundai i20 in Faridabad and Delhi from the night of November 9 and before the blast at 6.52 the next day or gave them to someone he met during the journey. The blast claimed at least 11 people. While the investigating teams have found the footage of more than 50 CCTV cameras, confirming Nabi's car journey in Haryana's Faridabad and Mewat region apart from multiple places in south, east, central and north Delhi, they have focused their probe on the four locations where he was seen out of the i20 car that he drove alone and lastly used it in the explosion, the officials said, asking not to be named. Two such places are in Delhi - Faiz Elahi Masjid (mosque) at Turkman Gate near Ramlila Maidan, where Nabi had gone around 2.30 pm, nearly four and a half hours before the blast, and stayed for about 15 minutes and Red Fort's parking lot near Sunehri Masjid, where he had parked his car and remained there from 3.19 pm to 6.22 pm on that day. Nabi's presence at the two locations have been corroborated by staffers of the mosque and the parking lot and also by the CCTV footage in which he was seen without his mask, said an investigator from the special cell, who asked not to be identified. "The CCTV footage from Turkman Gate shows Nabi parking the car outside the mosque and going inside. He had removed his mask at that time. We showed the footage to all office bearers and staffers of the mosque, asking if they had seen him meeting anyone there, keeping his mobile phones or giving them to someone and what all he did during his stay in the premises. All of them claimed not to have seen or met Nabi. Their claims are being verified through digital and other evidence. The footage do not show Nabi with mobile phones," the officer said. The premises of the mosque and the areas outside it were thoroughly searched by police personnel on Tuesday and Wednesday to see if any mobile phones were dumped there.. Investigators have prepared a list of people, who visited the mosque around the time Nabi remained there, by scanning the CCTV cameras and through human intelligence gathering. The list includes people seen entering and exiting the mosque on November 10, especially from morning till the blast happened. "The antecedents of all such people are being verified. Those already identified are being questioned about their purpose of visiting the mosque on that day, and if they had met or seen Nabi. There are some people whose identities are still being ascertained," the officer added. Similarly, Nabi was captured in CCTV cameras walking to the entry-exit gate of the Red Fort's parking lot, a few minutes after he parked the i20 car inside. Officials said Nabi was without a mask and he was not holding any mobile phones while he was briefly walking around inside the parking lot. The CCTV footage showed him alone and not talking to anyone. He mostly remained inside his car, which was parked at a location that was not covered by CCTV cameras. The investigating teams, another officer said, have also prepared a list of all the vehicles that were parked in the parking lot on November 10 and are questioning their owners and drivers. Investigators have reasons to believe that Nabi assembled the premature bomb using explosive substances and other equipment during his three hours of stay in the parking lot, the second officer said. Investigators have learnt that Nabi had at least five different mobile numbers. His two prime phone numbers became inactive on October 30, soon after his key accomplice, Dr Muzammil Shakeel Ganaie,35, was arrested. Nabi fled the campus of Al Falah University in Faridabad, where he worked and lived, the same day. They have collected call detail records (CDR) of at least one phone number that Nabi was using and are analysing it. They are also trying to find out if Nabi had procured more mobile phones and new SIM cards after he fled the university campus....