"Successful launch of South Asian Satellite is a historic moment. It opens up new horizons of engagement. This will also greatly benefit South Asia & our region's progress," Modi said in a series of tweets minutes after an Indian rocket with the over two ton South Asia Satellite blasted off from the Sriharikota spaceport.

"I congratulate the team of scientists who worked hard for the successful launch of South Asia Satellite," he said congratulating the Indian Space Research Organisation (ISRO).

I congratulate the team of scientists who worked hard for the successful launch of South Asia Satellite. We are very proud of them. @isro

— Narendra Modi (@narendramodi) May 5, 2017

"The historic occasion has been made better with a surprise - we have leaders of South Asian nations joining us in celebrating this launch. I welcome President @ashrafghani, PM Hasina, PM @tsheringtobgay, @presidencymv Abdulla Yameen, PM Prachanda, President @MaithripalaS," said Modi.

"We are a united family of South Asian countries, united in our pursuit of peace, progress & prosperity of our region & the entire humankind.

"The support and presence of these leaders will add even more joy in the hearts & minds of our region," he added.