The departures at Facebook's fastest-growing revenue generator come just months after the exit of Jan Koum, co-founder of Facebook-owned messaging app WhatsApp, leaving the social network without the developers behind two of its biggest services.
They also come at a time when Facebook's core platform is under fire for how it safeguards customer data, and while it defends against political efforts to spread false information.
Their announcement came after increasingly frequent clashes with Facebook Chief Executive Mark Zuckerberg over the direction of Instagram, Bloomberg reported.
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