India's military chief and his wife were among 13 killed in a helicopter crash around noon local time on Wednesday.
Gen. Bipin Rawat was traveling to Defence Services Staff College, Wellington in the southern Indian state of Tamil Nadu to address the faculty and student officers of the Staff Course. The helicopter crashed roughly 2 miles away from the college, in Coonoor.
The Indian Air Force confirmed the crash in a thread on Twitter, calling it a "tragic accident," adding that the vehicle was an IAF Mi 17 V5, a Soviet-designed military helicopter.
One of the 14 people aboard the aircraft survived and was being treated at a hospital.
The cause of the crash wasn't immediately known. Authorities are investigating.
Prime Minister Narendra Modi called Rawat "an outstanding soldier" and a "true patriot" who has greatly contributed to modernizing India's armed forces and security apparatus.
"His insights and perspectives on strategic matters were exceptional," Modi stated on his official Twitter account. "India will never forget his exceptional service."
Other Indian officials express their condolences, some on social media.
"India stands united in this grief," Rahul Gandhi, a member of the Indian National Congress, tweeted, calling the accident "an unprecedented tragedy."
Born in 1958, Rawat became India's first chief of defense staff, or CDS, in 2019. As the highest-ranking active duty military officer in the country, he also worked as an adviser to the minister of defense and led India's Department of Military Affairs.