Facebook claims a series of reports by an Indian news site, The Wire, were based on faked documents.
On Tuesday, an expert The Wire used in a story denied publicly that he commented in any way to the publication.
Stone responded on Twitter saying, "as it's been clear from the outset @thewire_in's stories are based on fabrications."
Varadarajan wrote on Twitter that the email account The Wire uses, a protonmail.com address, had been "hacked via the hacking of a MacBook."
Kumar of The Wire deactivated his Twitter account.