(Reuters) - Social networking company Facebook Inc said it would buy mobile messaging company WhatsApp for about $16 billion in cash and stock.
Facebook said it would pay $4 billion in cash and about $12 billion in stock.
Facebook said WhatsApp co-founder and Chief Executive Jan Koum would join Facebook's board.
(Reporting by Soham Chatterjee;; Editing by Savio D'Souza)
