Museum bit isn't surprising, pretty much everybody (including the protesters) don't want the fire spread to that museum. NDP headquarters is a bit more of a mystery, considering that it's empty and burning merrily. They might bring in fire equipment, but commentator on AJ is saying "it'd only be a shell, it's already gutted".
They're talking about ElBaradai as a possible replacement. Makes sense. It makes his house arrest that much more ominous, though.