An Indian Air Force (IAF) transport aircraft AN-32, took off from Assam’s Jorhat with 13 people on board on Monday has gone missing over hilly terrain in the Northeast. The aircraft lost contact with ground crew at 13.00. At present, a search operation are still being carried out. To locate it, IAF has launched Sukhoi-30 combat aircraft and C-130 special operation aircraft.

But this is not the first time an IAF aircraft has gone missing. There has been few similar incidents in the past too. Here is a list of the accidents involving MiG-21, AN-32, and Sukhoi Su-30 planes over the few last decade:

AN-32 aircraft (2009)
This was one of the first incident when an AN-32 aircraft crashed in Arunachal Pradesh. The crash killed all 23 people on board. The incident reportedly led India to upgrade the aircraft in the air force.

July 2016
An aircraft travelling from Chennai to Port Blair went missing in July with 29 people on-board. A searched operation was launched which went for few days but yielded no results and all people were presumed dead.

Sukhoi Su-30 (April 30, 2009)
First-ever Su-30 MKI fighter plane crashed near Rajasthan’s Jaisalmer. The incident killed an IAF pilot while another got seriously injured. 

Sukhoi November 30, 2009
The Sukhoi jet crashed during a routine training in south-west of Pokhran firing ranges in Rajasthan. There was no loss of life with both the pilots bailed out safely.

Sukhoi Su-30 MKI (July 14, 2018)
A Sukhoi Su-30 MKI went missing during a training mission near Assam’s Tezpur. Wreckage of the aircraft was found three days later along with the black box while both the pilots were killed as they were unable to eject before the crash.

MiG aircraft (May 2002)
On 3 May 2002, an Mikoyan-Gurevich MiG-21bis crashed into an office building in Jalandhar, Punjab, killing eight and injuring 17 people on the ground. The pilot, managed to eject from the aircraft, survived.