WASHINGTON — The timing of a highly-anticipated July 17 hearing with special counsel Robert Mueller was in doubt Friday as Democrats negotiated a possible one-week delay with Mueller’s representatives and the Justice Department.

The negotiations are ongoing, but an agreement under discussion would push the hearing to July 24 and give lawmakers more time for questioning. That’s according to multiple people familiar with the talks who requested anonymity because a final decision had not been made.

Members of both parties have expressed worries that the hearing’s scheduled format, which would give roughly two hours each to the judiciary and intelligence committees, doesn’t provide enough time for all members to ask questions about Mueller’s investigation of Russian interference in the 2016 U.S. election. Lawmakers were also concerned that expected closed-door sessions with two of Mueller’s deputies, James Quarles and Aaron Zebley, appeared to be in doubt after the Justice Department pushed back on the arrangement.

Some lawmakers were told Friday morning that the hearing with Mueller had been delayed, according to three of the people, but there was still uncertainty Friday evening.