WASHINGTON (AP) — FBI Director James Comey says discussions are continuing about whether to share detail with Apple about how the bureau hacked an iPhone in a terrorism investigation.

Comey provided details on the case during a speech Wednesday evening at Kenyon College in Ohio.

Comey calls it a "technological corner case." He says the tool only works on the iPhone 5C running version 9 of Apple's mobile operating system.

He says the FBI purchased the tool from an "outside party" and is confident it will be protected and used lawfully and appropriately.

Last month, the Justice Department dropped its legal fight to compel Apple to provide access to the phone used by Syed Farook. Farook and his wife killed 14 people in San Bernardino, California, in December.