Karandeep Anand, an Indian-origin senior executive of Facebook, will head the social media giant's enterprise communications tool Workplace, the company has announced.

Facebook investors have called on the company's chief executive Mark Zuckerberg to step down as chairman following reports that the company hired a public relations firm to smear its critics, a media report said on Saturday.

Facebook said Monday it had blocked some 30 accounts on its platform and 85 accounts on photo-sharing social network Instagram over concerns they may be linked to foreign entities and aimed at interfering in US midterm elections.

WhatsApp introduced "Delete For All' feature last year in which the users were allowed to delete a sent message within 420 seconds or 7 minutes. WhatsApp later advanced this time limit to 1 hour, 8 minutes and 16 seconds. But now, WhatsApp's "delete for message for everyone" is getting a major refresh and this time it isn't on the sender side but also for the recipient. According to WABetaInfo, a fan site that tests new WhatsApp features, says that the messaging platform is soon going to roll-out a new feature on the existing 'delete message for everyone' wherein if the recipient does not receive the delete request for the message in 13 hours, 8 minutes, and 16 seconds then the message will not be deleted.

Facebook had originally said up to 50 million accounts were affected in a cyberattack that exploited a trio of software flaws to steal “access tokens” that enable people to automatically log back into the social network.

A bug in Facebook's WhatsApp messaging service allowed hackers to take over users' applications when they answered an incoming video call, technology websites ZDnet and The Register reported on Wednesday.

Tech giant Google has said that its social network Google+ will be shut down after it was discovered that a bug exposed private data of up to 500,000 users to external developers.

WhatsApp beta on Android has been updated with two new features. Users can now ‘Swipe to reply’ on chats, and open video links without leaving the app.