The Washington Post posted this just after midnight:
Though looters were stopped at the Egyptian Museum, two mummies were vandalized when would-be looters ripped the mummies' heads off. At least 10 other artifacts were damaged. Young Egyptians stopped the looting, forming a human chain around the museum. Zahi Hawass, head of antiquities at the museum, told the Associated Press he is fearful that the National Democratic Party of Egypt headquarters, which is still on fire, may fall over and damage the museum.The BBC posted this minutes later (with a photograph of the cordon):
Rahim Hamada called the BBC from Cairo: "Civilians are surrounding the museum of Cairo in [Tahrir] Square and protecting it from looting. All the police have left the square, I think, to try and create disorder, but the civilians are taking control and organising traffic. They are also protecting property from looters and thieves, and taking back stolen goods, which are being placed in the yard of the museum for safety. We want this protest to be peaceful."See also the comment from Culture Monster at the LA Times.