This story has been updated:
WASHINGTON — The FBI said Monday it successfully used a mysterious technique without Apple Inc.'s help to hack into the iPhone used by a gunman in the Dec. 2 mass shooting in San Bernardino, effectively ending a pitched court battle between the Obama administration and one of the world's leading technology companies.
The government asked a federal judge to vacate a disputed order forcing Apple to help the FBI break into the iPhone, saying it was no longer necessary. The court filing in U.S. District Court for the Central District of California provided no details about how the FBI did it or who showed it how. Apple did not immediately comment on the development.
The brief court notice left important questions unanswered: Who showed the FBI how to break into iPhones? How did the government bypass the security features that Apple has invested millions of dollars to build into its flagship product? Are newer iPhones vulnerable to the same hacking technique? Will the FBI share its information with scores of state and local police agencies that said they also need to break into the iPhones of criminal suspects? Will the FBI reveal to Apple how it broke its security? Did the FBI find anything useful on the iPhone?
The surprise development also punctured the temporary perception that Apple's security might have been good enough to keep consumers' personal information safe even from the U.S. government — with the tremendous resources it can expend when it wants to uncover something.