The muslims have been for the last couple of years excavating under Al-aqsa to create a larger prayer hall.
The Jews have compalined, saying that it's destroying valuable archeological artiifacts, They also claim that it may be an attempt to erase as much as possible, evidence that links the Mount to the Jews.
(In Palestinian schools and mosques, Arab kids are taught that there is no historical connection between the Jews and the Land of Israel, that it is a fiction invented by imperialist westerners and zionists)
Subsequent to this excavation and construction, the South Wall (not the Western, "Wailing" wall) was found to be bulging outward.
A dispute arose about whether it was in fact bulging, at last the Waqf admitted wahat everyone else saw and with the help of the Jordanians started to "repair" the bulge. Then they compalined that the Israelis were hindering access to the southern wall.
Now thewre is word that this interior wall of Al Aqsa has collapsed.
The South Wall is where the "hulda staircase" once was, (remnants still there). This is where Jesus often went up to enter the Temple precincts.