Gen Bipin Rawat, India's first Chief of Defence Staff, his wife and 11 other armed forces personnel died on Wednesday after the military helicopter they were travelling in crashed near Coonoor in Tamil Nadu, the Indian Air Force said.
The lone survivor, Group Captain Varun Singh, is currently under treatment at a military hospital in Wellington, it said.
Defence Minister Rajnath Singh said he was "deeply anguished" by the sudden demise of Gen Bipin Rawat, his wife and 11 others in an "extremely unfortunate helicopter" accident.
"Gen Bipin Rawat, Chief of Defence Staff (CDS) was on a visit to Defence Services Staff College, Wellington (Nilgiri Hills) to address the faculty and student officers of the Staff Course today," the IAF said in a statement.
"With deep regret, it has now been ascertained that Gen Bipin Rawat, Mrs Madhulika Rawat and 11 other persons on board have died in the unfortunate accident," it said. The mortal remains of all the deceased will be brought to Delhi on Thursday.
The Prime Minister-led Cabinet Committee on Security (CCS) met to discuss the situation arising out of the crash.
Prime Minister Narendra Modi on Wednesday expressed his deep anguish on the death of Gen Bipin Rawat in a helicopter crash and said his insights and perspectives on strategic matters were exceptional.
Describing CDS Rawat as "an outstanding soldier" and "a true patriot," the Prime Minister said he greatly contributed to modernising our armed forces and security apparatus.
The Prime Minister also expressed his anguish at the death of others on board the helicopter including Gen Rawat's wife and defence officers.
"I am deeply anguished by the helicopter crash in Tamil Nadu in which we have lost Gen Bipin Rawat, his wife and other personnel of the Armed Forces. They served India with utmost diligence. My thoughts are with the bereaved families," the Prime Minister said in a tweet.
"Gen Bipin Rawat was an outstanding soldier. A true patriot, he greatly contributed to modernising our armed forces and security apparatus. His insights and perspectives on strategic matters were exceptional. His passing away has saddened me deeply. Om Shanti," he added.
PM Modi said that as India's first CDS, Gen Rawat worked on diverse aspects relating to the country's armed forces including defence reforms.
"He brought with him a rich experience of serving in the Army. India will never forget his exceptional service," the Prime Minister said.
Madhulika Rawat, Brigadier L.S. Lidder, Lieutenant Colonel Harjinder Singh, Naik Gursewak Singh, Naik Jitender Kumar, Naik Vivek Kumar, Naik B. Sai Teja and Havaldar Satpal were travelling along with General Rawat.
Apart from them, two pilots, a Group Captain and a gunner were onboard the ill-fated chopper.
Singh, along with his wife and seven staff, boarded a flight at Delhi for the Sulur IAF base near Coimbatore at 8:47. They landed in Sulur at 11:34 am. From there, they boarded the Mi17V5 helicopter at 11:48. At 12:22 pm, the Air Traffic Control (ATC) lost contact with the chopper, which crashed in a forest area around 7 km from Coonoor.
The IAF said a Court of Inquiry has been ordered into the accident. The report is expected in one month.
As Chief of Defence Staff, Gen Rawat was overseeing the implementation of an ambitious tri-services modernisation plan to bring synergy among the armed forces and enhance their overall combat capabilities.
"My heart goes out to the families of those who lost their loved ones in this accident. Praying for the speedy recovery of Gp Capt Varun Singh, who is currently under treatment at the Military Hospital, Wellington," Singh tweeted.
"General Rawat had served the country with exceptional courage and diligence. As the first Chief of Defence Staff he had prepared plans for jointness of our Armed Forces," he said.
Gen Rawat had served as the Chief of the Indian Army from December 17, 2016, to December 31, 2019.
He was appointed as India's first Chief of Defence Staff on December 31, 2019.
Army Chief Gen MM Naravane and all ranks of the force paid heartfelt condolences on the untimely demise of Gen Rawat, his wife and 11 others.
"The dynamic and inspiring leadership of General Bipin Rawat shall remain eternally etched in our memories. The #IndianArmedForces will forever remain indebted to his invaluable contributions," the army tweeted.