someone unspecified tried to put it back using epoxy. When the epoxy was visible, someone tried to remove it and scratched the mask.
The Ministry of Antiquities is investigating, but this adds to the concern over the fate if antiquities in Egypt since 2011. The single best known attraction of the museum (and an exhibit whose world tours have earned lots of money), has been repaired (and botched) by museum conservators using the kind of technique a kid might lose to fix a broken toy.
I have no words. Or none of more than four letters at any rate.