The U.S. government has dropped its effort to force Apple to help access information contained on the iPhone of San Bernardino shooter Syed Rizwan Farook. In a court filing Monday, the government said it “has now successfully accessed the data stored on Farook’s iPhone and therefore no longer requires the assistance from Apple Inc. mandated by Court’s Order Compelling Apple Inc. to Assist Agents in Search dated February 16, 2016.”

The filing does not reveal the method used to gain access to the data, but Re/code reports: “A mysterious method suggested by a third party appears to have allowed the FBI to hack into the iPhone.”

Re/code adds: “The FBI is still reviewing the information retrieved from the phone, and law enforcement officials declined to describe what kind of information they found and whether or not it was useful to the investigation into the shooting that killed 22 people on Dec. 2.”

In a background briefing, a law enforcement official reportedly indicated that the third party is not another U.S. government agency, but declined to elaborate.