The 2013 Patna serial blasts had left six dead and scores injured at the venue of a political rally of Prime Minister Narendra Modi, who was then the chief minister of Gujarat.
The accident caused a subaquatic firestorm that seemed to boil the waters of the Gulf of Mexico, prompting environmentalists to lash out.
It is learnt that the drone was spotted late last week.
As per the officials, the drone was spotted by the alert BSF personnel in Arnia sector on the outskirts of Jammu around 4:25 am.
This comes a day after the elite counter-terrorism unit submitted a preliminary report of the incident to the Union Home Ministry.
According to the officials, the investigators are yet to establish the flight path of the unmanned aerial vehicles.
They said the whole area outside the military station was cordoned off immediately and a massive search operation was going on when the last reports were received.
Two IAF personnel were injured in the explosions that took place around 1.40 am within six minutes of each other.
The explosion took place in the evening at a building in Dhaka's Moghbazar area, and rescuers reached the scene, said Faisalur Rahman, a fire control room official.
The police also said an IED weighing 5-6 kgs was recovered by Jammu police from Narwal area.
The Indian Air Force is also probing the possibility of the use of drones in the incident
The blasts occurred at around 1.45 am on Sunday at the high security technical area of Jammu airport, officials said
The students were arrested from Kargil and brought to Delhi on transit remand
The blast took place at a police picket outside Saeed's house at the BOR Society in Johar Town around 11am.
Photos circulated on social media showed a ripped up motorcycle at the scene but police did not say whether the blast was an assassination attempt.
The explosion at 4 pm local time was due to the “negligent handling of dynamite” in the military barracks located in the neighbourhood of Mondong Nkuantoma in Bata.
The first images and footage shared on social media showed a tower of smoke coming out from the six-story building and rubble scattered in Toledo Street, near the city center.
The August 4 explosion killed 200 people, injured thousands and caused wide destruction in Beirut.
Bharatiya Kisan Union (BKU) spokesperson Rakesh Tikait at Ghazipur border after a bill to cancel the three contentious farm laws was passed during the Winter Session of the Parliament, in New Delhi.PTI Photo/Kamal Kishore
India's captain Ajinkya Rahane speaks to on field umpires as after they stopped play at the end of the fifth day their first test cricket match with New Zealand in Kanpur.AP Photo/Altaf Qadri
New Zealand's Ajaz Patel is beaten by a delivery bowled by India's Ravindra Jadeja during the day five of their first test cricket match in Kanpur.AP Photo/Altaf Qadri
India's players celebrate the wicket of New Zealand's Tim Southee during the day five of their first test cricket match with New Zealand in Kanpur.AP Photo/Altaf Qadri
Congress leader Rahul Gandhi addresses the media at Vijay Chowk during the Winter Session of the Parliament, in New Delhi.PTI Photo/ Shahbaz Khan
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