The 82-year-old former president was deposed Feb. 11 after 18 days of popular protests and has been under house arrest in the Red Sea resort of Sharm El-Sheikh for the last two months. The public prosecutor said Monday he would be questioned.

Mubarak's two sons were also summoned and were being questioned at the prosecutor's office in the provincial capital of El-Tor Tuesday.

Dozens of demonstrators picketed the hospital, denouncing the president and carrying a sign reading "Here is the butcher." They scuffled with supporters of Mubarak amid a massive security presence.

Two security officials said Mubarak arrived under heavy police protection to the main hospital and, according to two doctors in the hospital, he stepped out of his armored Mercedes unaided and was taken to the presidential suite in the pyramid-shaped building.

The officials and doctors spoke on condition of anonymity because they were not authorized to speak to the media.