The screenshot of the hacked Antrix website
The website of Antrix, Indian Space Research Organisation's commercial arm, was hacked on Sunday.
The URL antrix.gov.in leads to a web page to buy sports merchandise and is believed to be the handiwork of Chinese hackers.
This comes two days after ISRO launched five British satellites from its Polar Satellite Launch Vehicle, its heaviest commercial launch, from Sriharikota in Andhra Pradesh.