The National Investigation Agency (NIA), which is probing the case, had lifted six boot prints from a six-km stretch near the Bamial village along the India-Pakistan border.
Officials, however, stressed that there was no indication so far that the terrorists, suspected to belong to Pakistan-based terror outfit Jaish-e-Mohammad, may have received help from an insider at the airbase.
Rafeeq has reportedly confessed about his involvement in the Church Street Blast during custody.
Last week, 14 youths were arrested by the NIA and other security agencies after they allegedly formed a module on the pattern of dreaded ISIS to carry out strikes at vital installations.
The two, whose names have been withheld, were being questioned by a joint team of intelligence agencies.
According to the sources, the probe agency informed the court that the accused were arrested for allegedly planning to carry out attacks ahead of the Republic Day.
The NIA and other central security agencies arrested 14 people on Friday and Saturday for allegedly planning to carry out attacks ahead of Republic Day.
Hyderabad residents Abu Anas and Nafees Khan, both aged 24 years, were produced before special judge at Patiala House courts and their custody handed over to the NIA, sources in the agency said.
The arrests were made following simultaneous searches and raids conducted at 12 locations in six cities.
14 men who were allegedly “radicalised online” and had formed an outfit named ‘Junud ul Khalifa e Hind’.
Mudabbir Hussain Sheikh, 33, was arrested from his Mumbra apartment. The second man, Mumbai resident Khan Mohammed Hussein, 36, was arrested from his Tulsiwadi residence in Mazgaon.
Besides Naveed and his slain accomplice Abu Nomen, also from Pakistan, the NIA investigation has named seven people from the Valley who provided logistics to the two Pakistani terrorists in carrying out the attack.
Singh had been summoned by the NIA on Friday to appear before it for detailed interrogation.
He started his journey from Bamial, a border village where a farmer, Jaspal Singh, had noticed some suspicious footprints in his fields located near the border.
Both Purohit and Dwiwedi had contended that the investigation conducted by the NIA since 2011 is not a continuation of that of the Maharashtra Anti Terror Squad, the original investigating agency.