With his wife under federal investigation for her use of a private email server, former U.S. President Bill Clinton had a private meeting with Attorney General Loretta Lynch at a Phoenix airport earlier this week, in what both sides say was an unplanned coincidence. Linda So reports.

New questions are swirling after word got out that former President Bill Clinton met privately with U.S. Attorney General Loretta Lynch on Monday....this, as federal investigators continue their probe into Hillary Clinton's use of a private email server when she was Secretary of State

"I did see the president at the Phoenix Airport the other night as I was landing and he was headed out," Lynch said.

That meeting took place on the tarmac at a Phoenix airport. It lasted about 30 minutes on Lynch's plane, but the attorney general insists there was no discussion about the email investigation.

"[Bill Clinton] did come over and say hello and speak to my husband and myself and talk about his grandchildren and his travels and things like that," Lynch said. "So that was the extent of that."

Both sides say the meeting was an unplanned coincidence.

But that isn't keeping critics quiet especially Republicans who have called for the appointment of a special prosecutor for Clinton's email investigation.