The Pegasus Project, a consortium of international news organisations, believes the leaked data is indicative of potential targets identified in advance of possible surveillance attempts.
Deol took to Twitter and shared a screenshot where she received a 'copyright violation' message, after which the security of her Instagram account was compromised.
Passersby rushed Rajasekar to the Government Stanley Hospital, where he succumbed on Monday morning.
The news of comes two days after the "Cargo" actor said that security of his Instagram and Facebook pages was compromised.
Khan said while both her Twitter and Instagram page were hacked, she was able to reinstate the latter thanks to her husband, director Shirish Kunder.
The government's Cybersecurity and Infrastructure Security Agency said it was working with other agencies to help 'identify and mitigate any potential compromises'.
Facebook has Monday been verbally asked to update the government on the number of Indian users impacted by the recent attack.
The RSS worker, identified as Shimoj, was attacked with sharp objects and sustained injuries on his face and chest. CPM member Babu was also hacked to death in Mahe.
The trouble began with the Defence Ministry website where a Chinese character appeared on top of its home page when www.mod.gov.in was opened.
A complaint has been filed with the Delhi Police and the matter is being investigated, an official said.
The BJP, which is fast emerging as the Left’s principal rival, claimed the assailant was a CPI-M supporter.
Even social networking websites with two-step verification procedures are not secure any more.