Tonight is the traditional anniversary of the death of the Biblical Aaron.
Jordanian media is filled with stories of a group of Jews who visited the "shrine of the Prophet Aaron," as the Muslims characterize it. There they performed "religious services."
The video showing the supposed services is only 8 seconds long, and it looks like they are singing but not praying, from what I can tell.
Jews have gone there before, as in this video from last year shows:
As a result of Jews actually treating a holy place as a holy place, the Minister of Awqaf and Islamic Affairs in Jordan, Dr. Nasser Abu Al-Basal, decided to close the building and not to allow any visitor to enter the shrine without obtaining the ministry's approval.
The ministry also said that it will open an investigation into how Jews managed to enter and chant without knowledge of the locals.
As far as I can tell, there is no mosque on the site (yet.) So Jordan's objections to Jews praying there isn't because it is desecrating a mosque, but because they simply don't want to extend any basic rights to Jews.
UPDATE: The Jewish Press has more, and more video. (h/t Irene)