"While it is sad to lose such great people, this also creates opportunities for more great leaders who are energized about the path ahead to take on new and bigger roles", Zuckerberg said.
Facebook has seen plenty of internal rearranging over the past couple of years, as executives have left the company or moved around it into new roles.
Chris Cox, the chief product officer who was considered to be a close friend of Mr Zuckerberg, and Chris Daniels, the head of WhatsApp, are departing.
Cox, who dropped out of a Stanford University graduate degree program to work with Zuckerberg when the company had just 15 engineers, was widely seen as one of the most popular and capable executives at the social network - and a potential replacement CEO, were Zuckerberg to leave. "He believes deeply in providing end-to-end encryption to everyone in the world across our services", Mark Zuckerberg wrote in a blog post, welcoming Will Cathcart as the new head of WhatsApp. Daniels worked for Facebook for eight years, and was promoted to oversee WhatsApp last May.
Cox was in charge of Facebook's apps including its flagship social media site, as well as Instagram, WhatsApp and Messenger.
Zuckerberg, in a separate post, said Cox had discussed the possibility of moving on "for a few years", but had remained for a transition period.
The departures of Cox and Daniels come a day after a technical issue that limited use of Facebook and Instagram for most of Wednesday.
Perhaps more than anyone else at Facebook - even more than COO Sheryl Sandberg - Cox was a sounding board for Zuckerberg on product ideas.
Facebook's family of apps strategy has so far been led jointly by Cox and Javier Olivan, vice president of growth. Zuckerberg wants to encrypt user content and make posts, messages, and photos ephemeral, much like Snapchat. Instead, Fidji Simo will be appointed as the new head of the Facebook app.
Forrester analyst Jessica Liu said it sounded like Cox was "subtly disagreeing" with Zuckerberg's privacy memo, based on Cox's farewell post.
With Daniels' departure, WhatsApp will be led by Will Cathcart, who most recently led the Facebook app.
The ABC hosts debated whether an impostor had traveled with Trump to Alabama to check on tornado damage and survivors. The first lady's spokeswoman Stephanie Grisham called the show's joking on the subject "shameful".
Suppliers were originally told that production would start on the vehicle in November 2019, sources told Reuters a year ago . It wasn't until last month that Tesla announced it would take orders for the $35,000 version, which has a shorter range.
He didn't break the bank in free agency , but he was able to find himself a long-term deal with guarantees. "Certainly has a lot of interest", Rapoport said of Tate during a Thursday appearance on NFL Network.
The Max mock-up is the newest version of Boeing's workhorse 737 models, the world's most popular commercial aircraft. Nine British passengers are among the 157 people killed when a plane crashed in Ethiopia on Sunday.
Fadnavis said the he has instructed the Mumbai police not to spare anyone responsible for the collapse of the foot overbridge . Surprisingly, as per the locals, the bridge was not in bad condition and still a part of the foot over bridge collapsed.
Police posted images to social media yesterday showing the arrow pierced the smartphone, which was left with a cracked screen. It's a good thing that he did - an arrow that could have easily skewered him was stopped by his phone.
Dustin Johnson is one of the frontrunners at The Players Championship , but Tiger Woods hopes to be back in contention. Thomas took a step back at the Honda Classic two weeks ago, recording a 30th-place finish.
The blackout lasted more than 12 hours for some people, with users in North America and Europe being the most affected. As of Thursday morning, the only good news for Facebook is that plunging stock price appeared to have found a floor.
International Brent crude oil futures were at $67.61 a barrel at 0054 GMT, up 6 cents, or 0.1 percent, from their last close. Crude oil production in the country also fell by 106,000 barrels per day (bpd) to around 12 million bpd, the data showed.
Markets Right Now: Stocks end mostly higher; Boeing falls
Further details revealed the drop in December was the biggest since September 2009 when the economy was emerging from recession. February's retail sales report, which was scheduled for publication on Thursday, will be released on April 1.
Some KCI flights reassigned after Boeing planes grounded
The Boeing 737 Max 8 was involved in a fatal Ethiopian Airlines crash this past weekend, which killed all 157 people on board. Since the jets were grounded, North American carriers have been wrestling with customer calls and flight cancellations.
Captain Marvel will not release in Pakistan
That low of a score is unwarranted, both for Larson's performance and the overall quality of the film. The rest of the trailer cannily reuses footage from the previous 20+ MCU films to great effect.