New Delhi, Jun 27: The National Investigation (NIA) has chargesheeted three more persons, including a paediatrician who is absconding, for involvement in the high-intensity vehicle-borne bomb blast near Delhi's Red Fort last year, officials said on Saturday. The NIA has named Zameer Ahmad Ahanger, Tufail Ahmad Bhat and absconding Muzafar Ahmad, alias Faraz alias Zafar - all from Jammu and Kashmir - as accused in its supplementary chargesheet filed before Patiala House Courts here, they said. This takes the number of persons chargesheeted in the case to 13, which includes prime accused Dr Umer Un Nabi, driver of the explosive-laden car who died in the blast, officials said.