The State Department said Tuesday that a "glitch" led a video on its website to be altered in such a way that it removed comments from a spokeswoman who seemed to admit in 2013 that the government lied about when the Iran nuclear talks started.

"There was a glitch in the State Department video," spokeswoman Elizabeth Trudeau told reporters.

State was forced to respond to questions after it became clear on Monday that a Dec. 2, 2013 video of a briefing with reporters was selectively edited. That edit removed a discussion between former spokeswoman Jen Psaki and Fox News reporter James Rosen about when the Iran talks began.

Rosen noted the missing piece of video in a report Monday night, and Trudeau said State worked quickly with Fox to replace the video.

"When Fox flagged it for us, we actually replaced it" with video from another source, she said.

When pressed, Trudeau said State wasn't aware of any other videos that might have been subject to similar glitches, but said officials are looking more closely at it.

"We're looking into it, genuinely, we think it was a glitch," she said.

But those answers may not satisfy skeptics of the Iran nuclear deal, some of whom suspect that the video was edited on purpose to remove Psaki's comments that indicate the administration may have lied about when the Iran talks began.

Rosen and other reporters have pressed the Obama administration to explain whether the talks really started in 2011, two years earlier than when the government said they began. The date of the talks is important because the administration has said the talks first started in 2013, after more moderate Iranian leaders came into power.

In the 2013 press briefing, Rosen asked if the government ever lies in order to maintain secrecy, and Psaki seemed to confirm that is the case.

"James, I think there are times where diplomacy needs privacy in order to progress. This is a good example of that," Psaki replied.

That section of the video was missing in the department's video Monday night. It reappeared in the video by Tuesday morning, but a tweet from Fox News shows how the video looked before it was replaced:

Trudeau indicated that State wasn't trying to hide anything, in part by noting that the entire transcript of the briefing has not been affected, and by noting that other copies of the briefing appeared in full online.