Prime Minister Narendra Modi on Friday condoled the death of Vietnamese President Tran Dai Quang.

"Deepest and heartfelt condolences to the Party, nation and people of Vietnam and to the family of ... Tran Dai Quang," Modi tweeted.

We have fond memories of his great friendship for India and his successful state visit in March this year. pic.twitter.com/m6IHEuXPvb

— Narendra Modi (@narendramodi) September 21, 2018

"We have fond memories of his great friendship for India and his successful state visit in March this year," he said.

Vietnam's President Tran Dai Quang died Friday at age 61 after a prolonged and serious illness, state media reported. He passed away from a "serious illness despite devoted treatment by professors and doctors" both in Vietnam and abroad, the official Vietnam News Agency said.