According to Israel Hayom, journalist Benny Liss screened a movie of the finding of a “mass grave” just outside the Golden Gate a few years ago. Apparently “thousand of skeletons and human bones” were buried in a cave near the Temple Mount.
It is not clear if those bones belonged to Jews, Muslims or Christians. The announcement of the finding of this grave coincided with the Jewish Festival of Tisha be-Av, the day on which the Jews mourn the destruction of both the First and Second Temples. This, of course, shows that Benny Liss believes that they were Jewish, but the point is that that has not been proved yet.
We need to wait till the site can be excavated, before more definite conclusions drawn from this amazing find.