For four days since last Friday, protesters reoccupied parts of Tahrir Square in downtown Cairo and closed it off to traffic. Efforts by the army to evict them Saturday resulted in at least one death and dozens of injuries and raised tensions between the protesters and the country's military rulers.
On Tuesday, a scuffle broke out when some residents tried to break up the four-day sit-in, removing barbed-wire and barricades. The army then moved in and took control of the square and cordoned off the once grassy roundabout that had been the center of many demonstrations.
Mubarak has a history of minor ailments and underwent gallbladder surgery in Germany in March last year. He has kept a low profile since he was ousted, living on his compound in Sharm el-Sheikh. He was banned from traveling and his assets have been frozen. Many of his senior aides have already either been questioned or detained pending investigations.
But on Sunday, Mubarak defended himself in a prerecorded message saying he had not abused his authority, and investigators were welcome to check over his assets.
It was his first address to the people in the two months since his ouster. Shortly after, the prosecutor general issued a summons for Mubarak to appear for questioning.
In another tweet reacting to Mubarak's detention, activist Amr Bassiouny said the detention was not the protesters primary goal but "free speech, free assembly, free press — no torture, real democracy, end of lies."
Associated Press writers Paul Schemm and Maggie Michael in Cairo, and Yasser Imam and Ashraf Sweilam in Sharm el-Sheikh, Egypt, contributed to this report.