NBC News’ ongoing investigation of Brian Williams has expanded to a heretofore unknown incident involving comments he made on “The Daily Show” about what the anchor witnessed during the Arab Spring, The New York Times reported Friday.

The internal investigation that was ordered in the wake of Williams’ six-month suspension was already known to be focusing on at least five other questionable incidents.

In February 2011 Williams made an appearance on the Comedy Central show in which he described to host Jon Stewart an incident in which he witnessed on the ground in Tahrir Square a confrontation between protesters and government troops.

But the testimony potentially conflicts with evidence from NBC footage that places Williams in a balcony “overlooking Tahrir Square,” not in the middle of the protest.

The New York Times’ report noted that the internal investigation has yet to reach a conclusion about that incident, or about any of the other episodes already widely reported to be under suspicion.