Social networking giant Facebook has undergone one of its biggest-ever management reshuffles, made in response to recent privacy revelations.
Chief executive Mark Zuckerberg handed more powers to existing executives, while unveiling new managers for products such as WhatsApp and Messenger.
The reshuffle comes just weeks after it was revealed that political marketing agency Cambridge Analytica had got hold of the details of some 87 million Facebook accounts. However, Facebook has not fired any existing members of staff over that or any other privacy scandals that have enveloped the company in recent months.
Meanwhile, Zuckerberg and chief operating officer Sheryl Sandberg also hold on to their positions as the company's most powerful executives.
Having previously managed Facebook's core platform, chief product officer Chris Cox will also work across services such as Instagram, Messenger and WhatsApp.
Facebook's chief technology officer Mike Schroepfer and vice president of growth Javier Olivan have also been given more powers.
Schroepfer will lead the firm's "new platforms and infrastructure" division, while Olivan will look after its advertisement system and services business.
Despite the fact that Facebook acquired WhatsApp for $19 billion in 2014, the instant messaging service has been given a significant degree of autonomy.
Under Facebook ownership, it has been managed by Jan Koum, one of the app's co-founders. But last week, he announced plans to leave the company over what is believed to be plans by Facebook to weaken WhatsApp's encryption.
Chris Daniels will replace Koum as WhatpsApp's head.
To coincide with the reshuffle, Facebook has launched a specialist blockchain division to explore ways in which the technology can be used at the firm.
David Marcus, who has led Messenger for four years, will manage the division. Stan Chudnovsky is to take his previous role.
"After nearly four unbelievably rewarding years leading Messenger, I have decided it was time for me to take on a new challenge," wrote Marcus on Twitter.
"I'm setting up a small group to explore how to best leverage Blockchain across Facebook, starting from scratch."
Kevin Well, who has served as head of product at Instagram for the past few years, will also join Facebook's new blockchain division. Adam Mosseri will take his former role.
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