According to authorities, the group is suspected to be operating together as part of an international in-flight theft racket.
Shubham Upadhyay, a resident of Uttam Nagar in the national capital, was arrested for posting two bomb threat messages to draw attention after seeing similar news reports on TV, the police said.
The boy had sent the mail "just for fun" after being influenced by the news of another teenager who made a hoax bomb threat call a few days ago, deputy commissioner of police (IGI Airport) Usha Rangnani said.
The boy wanted to check whether it could be traced back to him or not, police said.
There was no loud noise of anything breaking when the rods of a portion of a roof collapsed at the Delhi airport's Terminal-1, Krishna Kumar, a cab driver who was at the site of the incident, said on Friday.
The countries offering visa-on-arrival service to Indian nationals have been exploited as 'Donkey Routes' by agents for people who endeavour to reach the United States and Canada.
The accused has been identified as Sonu alias Imam alias Yunus, a resident of C-Block in Jahangirpuri, they added.
In a purported video of the Saturday violence, the man, wearing a blue shirt, was seen opening fire during the clashes that had erupted when a Hanuman Jayanti procession was passing through localities in Jahangirpuri.
The revised statement issued by the police also did not name the VHP and the Bajrang Dal.
Hindu and Muslim communities together celebrated Eid on Tuesday at Jahangirpuri's Kushal Chowk by exchanging sweets and hugs, giving a message of peace and harmony in the area that witnessed communal violence last month.
Three doctors were allegedly assaulted by the family members of a patient at a private hospital in northwest Delhi's Pitampura after a newborn baby died during a caesarean procedure, police said on Thursday.
This came after police said it has registered a first information report (FIR) against the organisers for taking out the procession without permission, and arrested a person, identified as Prem Sharma, who is a local VHP leader.
The Delhi police arrested 14 people over the violence, including a 21-year-old man, who allegedly fired a bullet that hit a sub-inspector, officials said on Sunday.
The Delhi police has registered an FIR against two Twitter handles of a journalist and a news portal for allegedly inciting hatred between communities after they claimed manhandling of scribes during the controversial 'Hindu Mahapanchayat' event, officials said.
As the clip went viral on social media, hospitality firm OYO took off from its platform the hotel located in north Delhi's Jahangirpuri.
Police said there was stone-pelting and some vehicles were also torched during the clashes between two communities Saturday evening.
Narsinghanand, notorious for making intemperate remarks against Muslims, stoked yet another controversy with his comment that "50 per cent of Hindus will convert" in 20 years if a Muslim becomes the prime minister of India.
Hemmed in by barricades and police and paramilitary swarming all over the place, the troubled Jahangirpuri on Friday showed signs of returning to normalcy, with the local peace committee calling for communal harmony and members of the warring communities embracing each other, agreeing to let bygones be bygones.
A 25-year-old woman was stabbed to death while resisting a chain-snatching bid in northwest Delhi's Adarsh Nagar area, police said on Sunday.