New Delhi, Aug. 12 -- The National Investigation Agency (NIA) has taken blood and hair samples from Pravaiz Ahmad Jothar and Bashir Ahmad Jothar , the duo arrested in connection with the April 22 Pahalgam terror attack, to conduct DNA analysis and ascertain if they played a larger role than just sheltering the three Pakistani terrorists who shot 26 civilians, people familiar with the matter said. The DNA samples, collected from the Amphalla prison in Jammu, where the two are currently lodged, are likely to be matched with the clothes and weapons recovered from three terrorists , Suleiman Shah, Hamza Afghani alias Afghan and Jibran, added the people, asking not to be identified. The three terrorists, who shot dead 25 tourists and a pony operator on April 22 at Baisaran meadow in Pahalgam, were killed by security forces on July 28 in Dachigam forest area. Union home minister Amit Shah confirmed in Parliament on July 29 that the terrorists were from Pakistan and belonged to Lashkar-e-Taiba (LeT). Arrested on June 22, Parvaiz and Bashir Jothar allegedly harboured the three armed terrorists at a seasonal dhok (hut) at Hill Park before the attack, on April 21. "The two men provided food, shelter and logistical support to the terrorists who selectively killed the tourists on the basis of their religious identity," the anti-terror agency said in a statement in June. "We are trying to ascertain if they had any larger role in the Pahalgam attack other than just providing them shelter and food. Thus, their blood samples and hair follicle for DNA analysis have been taken to match with clothes, weapons and other articles recovered from Shah, Afghan and Jibran," said one of the people cited in the first instance, an officer with NIA. "The samples will also be useful in matching with articles recovered in previous attacks on civilians in Jammu and Kashmir, to see whether these two had any role to play in sheltering or assisting other terrorists or not," this person added. A second officer familiar with the Pahalgam probe said NIA "is currently analysing technical data retrieved from the phones and satellite phone recovered from the three terrorists, which will give more clues about the LeT handlers in Pakistan who controlled the attack"....