Sitharaman attended the SCO Defence Ministers' conclave in Bishkek where ways to further boost defence and security cooperation among the member countries in the wake of evolving security challenges in the region were discussed.
"This is a special event as we are celebrating 25 years of establishment of diplomatic relations with India. Prime Minister Narendra Modi visited our country in 2015 and after 13 years our President came to India on a state visit last year.
The majority of the dead are from the nearby village of Dacha-Suu where the plane -- a Turkish cargo flight to Istanbul from Hong Kong via Kyrgyzstan's capital Bishkek -- crashed at around 7.30 am local time (0130 GMT), a spokesman for the country's emergency services ministry told AFP.
The GKNB state security service said it was investigating the blast but provided no other details.
Presently, the company has its presence in Maldives, Turkey and Botswana implementing various projects and earning consistent revenue.
Modi, who flew into the Tajik capital from Kyrgyzstan on Sunday night, was accorded a ceremonial reception before getting into talks on a wide range of issues with the Tajik leadership.
India, which has had an observer status for the past 10 years, will technically become a member by next year after completion of certain procedures.
Thanking Putin for the news, Modi said, "Under your leadership in BRICS, India has become a member of SCO. I am very grateful."
The two leaders met ahead of the BRICS and Shanghai Cooperation Organisation (SCO) summits here. It is the fourth bilateral meeting between the two leaders since their first in Fortaleza, Brazil, last July.
Yuri Ushakov said their admission demands the coordination of a working memorandum and the two countries also need to join 28 key documents of the group.
As of now, India along with Afghanistan, Iran, Mongolia and Pakistan has the observer status in the organisation which mainly focused on the anti-terrorism cooperation among the member states.
Beijing and Moscow are competing for influence and profits in Central Asia, invoking a centuries-old battle for the energy-rich area, but political pundits are at odds as to who's winning so far.