The initial investigation into the Jammu Indian Air Force technical area blast case uncovered that drones were used to drop ‘impact' IEDs at the airbase. <br />Sources said that the drone attack on the Indian Air Force (IAF) station in Jammu was carried out using highly explosive "impact" IEDs. <br />It is the first time in India that an Unmanned Aerial Vehicle (UAV) has been used to attack critical infrastructure, sources added.