"The home page of the Antrix Corporation Limited website seems to have been hacked and we have already intimated this to the officials (of Antrix) who are dealing with the problem," a senior ISRO official told PTI.
He said other pages of the website were fine. "Other pages are fine... however the officials at Antrix are trying to find out the problem and solve it," he said.
Asked how much time it would require for the site to be set right, he said, "At this point I can only say that the officials are trying to fix the problem."
The official, who did not wish to be identified, however said the website is "under construction".
Asked if the Chinese were suspected to be involved in the hacking, the official said, "We cannot confirm this also, but Antrix officials are looking into the glitch."
The "hacking" comes two days after ISRO successfully launched five British commercial satellites onboard PSLV-C28 from Sriharikota in its heaviest commercial mission.
Antrix is ISRO's marketing arm for promotion and commercialization of space products, technical consultancy services and transfer of technologies developed by ISRO.
It provides space products and services to international customers worldwide. Its clientele includes EADS Astrium, Intelsat, Avanti Group, WorldSpace, Inmarsat, and other space institutions in Europe, Middle East and South East Asia.