“With respect to the president’s tweets about alleged wiretapping directed at him by the prior administration, I have no information that supports those tweets, and we have looked carefully inside the FBI,” he told the committee, according to the BBC.
http://www.breitbart.com/big-government/2017/09/18/james-comey-tried-to-discredit-trumps-wiretapping-assertions-that-proved-true/
As usual, without the follow up question that should have been asked: “what about wiretaps that captured his voice or data but were not directed at him.”