Apart from Aboh's son, the deceased included some other family members of the MLA.
"The Air Force has confirmed that the wreckage of the missing helicopter has been found 12 km south of Khonsa, the headquarters of Tirap district," Minister of State for Home Kiren Rijiju said in New Delhi.
One soldier of Assam Rifles was injured in the operation and his condition is stated to be stable, they said. The encounter took place in the jungle between Nginu and Ngissa villages of Longding, officials in Arunachal Pradesh said.
Facing a rout in other parts of the country, Congress retained power securing three-fourth majority in the Arunachal Pradesh Assembly snapping up 40 of the 60 seats and leading in two.
A helicopter of state-run Pawan Hans with three persons on board including a senior police officer on Tuesday went missing for a while before being spotted in a dense forest.
Three Army personnel were killed on Thursday and four injured when suspected NSCN rebels ambushed their vehicle in Arunachal Pradesh's Tirap district bordering Nagaland.
Union Home Minister P Chidambaram said there would be 'zero tolerance' towards militancy and violence while addressing a public gathering at Khonsa, the headquarters of troubled Tirap district in Arunachal Pradesh on Saturday.
They were protesting the killing of a youngster by the army.
Chetri was awarded the DG medal for his 30 years' outstanding services and nominated for President's Award.
The overall voting percentage in the bypolls to 51 assembly seats was nearly 56.84 per cent, the Election Commission said while releasing data available till 7 pm, adding that the polling passed off peacefully.
Counting of votes will be held on Thursday for 51 assembly seats and two Lok Sabha constituencies spread across 18 states where by-elections were held two days ago.
Although India has sought inputs from the Myanmar army since most of those involved in Thursday's ambush would have sneaked across into Myanmar, the fresh operations would smoke out insurgents based in hideouts on the Indian side along the border.