(Reuters) - Computer security software manufacturer Symantec Corp. <SYMC.O> will acquire LifeLock Inc. <LOCK.N> for $2.3 billion in cash, according to a tweet from CNBC, citing Dow Jones.

The Wall Street Journal also reported the deal for $2.3 billion, a 16 percent premium on LifeLock's Friday closing share price, citing a person familiar with the matter.

(Reporting by Dion Rabouin; Editing by Sandra Maler)