Biharsharif, Jan. 29 :    Biharsharif, Jan. 29:  All roads in the Calcutta conspiracy lead to Nalanda. The Bihar district, associated with Buddhism and more recently with Union ministers George Fernandes and Nitish Kumar, has emerged as the focal point in the probe into the American Center attack. After the Nalanda address on alleged mastermind Aftab Ansari's passport, the district popped up again in the investigation as home to one of the conspirators, Ibrahim Shah. Nalanda also offers a link, if tenuous, between the Calcutta conspiracy and the December 13 strike on Parliament. The family of Abdul Rahman Gilani, an accused, once lived here and the Delhi University teacher has been a regular visitor, intelligence officials said. Investigators from Calcutta, now in Hazaribagh, tipped off the police here yesterday that Ibrahim had obtained his driving licence (no 7576) from Nalanda. The police raided the district transport office (DTO) from which the licence, signed by one D.K. Singh, was supposed to have been issued. But a search revealed that no officer by that name was ever posted there. The licence number also does not tally with DTO numbers. Officers explained that the number of licences issued from the town could not be more than 1,000. Though the licence turned out to be fake, the police claimed to have gathered other vital clues. They got the name of Ibrahim alias Mohammad Ibrahim's village - Chhabilapur. About 20 km from the district headquarters, Biharsharif, the village is close to the ruins of Nalanda University and to Nitish's village, Nahabatpur. Nalanda is Fernandes' constituency. The police also stumbled upon names of two members of Aftab Ansari's gang - Jamaluddin Nasir and Akeel. Both are from the same village. While Akeel has been arrested, Jamaluddin is absconding. 'Whatever we have unravelled so far might be just the tip of an iceberg,' Nalanda superintendent of police Amit Lodha said. Officers are confident that Ansari's gang had links with Gilani, whose house is in a village called Gilani near Chhabilapur. The professor is also being linked to two other persons having ISI connections, who were arrested from Phulwarisharif in Patna in April last year. Identified as Laddu Mian and Samim Sarvar, the duo was allegedly involved in a plot to blow up the US embassy in Delhi. Laddu Mian, who is from Nalanda, and Sarvar had two houses in the district. 'You add the two different incidents - Delhi's December 13 strike and Calcutta's American Center attack. The two were carried out by the same gang, whose tentacles were spread over Nalanda,' said a senior Central intelligence officer who was in Nalanda yesterday. In the passport case, Nalanda police have arrested five persons, the superintendent said. Lodha is interrogating deputy superintendent of police Z. Ahmed. Ahmed's assistant, Paramanand Rai, has also been picked up.