From Guardian:
The scenes on Tahrir Square in Cairo appear peaceful, with makeshift tents springing up and many protesters settling down for the night. But an out of breath al-Jazeera reporter has just gone on air to say that, while leaving the square, he came across gangs of motorcyclists circling, with chants of "We love Hosni, we love you president" and "We don't want him to leave," along with a group of 300 or so demonstrators.
Hotel security in the area is said to be looking nervous and that the army units nearby are putting on flak jackets and moving to battle stations.