Stratfor says they have a source who says so. They have no confirmation of it, yet, however:
The Egyptian police are no longer patrolling the Rafah border crossing into Gaza. Hamas armed men are entering into Egypt and are closely collaborating with the MB. The MB has fully engaged itself in the demonstrations, and they are unsatisfied with the dismissal of the Cabinet. They are insisting on a new Cabinet that does not include members of the ruling National Democratic Party.
Very bad news, if true. Again, I’m no fan of Mubarak, but I am still less of a fan of seeing Egypt toppled into the hands of the Muslim Brotherhood and Iran.