Updated

Argentines and Uruguayans are joking about insulting comments that Uruguayan President Jose Mujica was caught making about his Argentine ally, President Cristina Fernandez. But politicians in both countries are concerned about the diplomatic fallout.

Mujica basically called Fernandez an "old shrew" and said she was "worse than her cross-eyed" late husband, Nestor Kirchner. "The cross-eyed guy had more of a political sensibility. This one is just stubborn as a mule," he added.

The comments were picked up on a microphone that Mujica thought was turned off. He says they weren't intended to be public, so he won't apologize.

Argentine Foreign Minister Hector Timerman protested to Uruguay's ambassador Friday, calling the comments "unacceptable and denigrating ... particularly from someone whom Dr. Kirchner had considered to be a friend."