The agreement to delay the hearings in exchange for extended testimony is not finalized, the sources said, and lawmakers are still negotiating.
Mueller has been scheduled to appear on July 17 before the House Judiciary and Intelligence Committees, in back-to-back sessions where 22 members from each committee would get to question the special counsel.
House Judiciary Chairman Jerry Nadler’s spokesman Daniel Schwarz said: “”At this moment we still plan to have our hearing on the 17th, and we will let you know if that changes.”
On Friday morning, the Judiciary Committee took an abnormal, brief recess from a hearing about lessons from the Mueller report so members could be informed about the discussions.
This story has been updated with additional developments Friday.