FBI investigating cause of cyber attacks - law enforcement official

A padlock is displayed at the Alert Logic booth during the 2016 Black Hat cyber-security conference in Las Vegas, Nevada, U.S. August 3, 2016. REUTERS/David Becker

WASHINGTON (Reuters) - The FBI is investigating the cause of cyber attacks on internet infrastructure company Dyn on Friday, which has disrupted access to dozens of websites including PayPal, Twitter and Spotify, a law enforcement official said. (Reporting by Julia Edwards; Writing by Eric Beech; Editing by Eric Walsh)