CAIRO (AP) -- Hosni Mubarak was sentenced to life in prison Saturday for failing to stop the killing of protesters during the uprising that forced him from power last year. The ousted president and his sons were acquitted, however, of corruption charges in a mixed verdict that swiftly provoked a new wave of anger on Egypt's streets.
Revolutionary groups and the powerful Muslim Brotherhood have called for a massive protest at Tahrir Square, the heart of the uprising, at 5 p.m. local time.
After the sentencing, the 84-year old Mubarak suffered a "health crisis" while on a helicopter flight to a Cairo prison hospital, according to security officials who spoke on condition of anonymity because they were not authorized to speak to the media. One state media report said it was a heart attack, but that could not immediately be confirmed.
The officials said Mubarak cried in protest and resisted leaving the helicopter that took him to a prison hospital for the first time since he was detained in April 2011. Mubarak stayed at a regular hospital in his favorite Red Sea resort of Sharm el-Sheikh from his arrest until his trial began in on Aug. 3. The officials said he insisted on the helicopter that he be flown to the military hospital on the eastern outskirts of Cairo where he has stayed during the trial.
Mubarak finally left the chopper and moved to the Torah prison hospital more than two hours after his helicopter landed there.
Earlier, Mubarak sat stone-faced and frowning in the courtroom's metal defendants' cage while judge Ahmed Rifaat read out the conviction and sentence against him, showing no emotion with his eyes concealed by dark sunglasses. His sons Gamal and Alaa looked nervous but also did not react to either the conviction of their father or their own acquittals.
Mubarak was convicted of complicity in the killing of some 900 protesters during the 18-day uprising that forced him to resign in February 2011. He and his two sons were acquitted of corruption charges, along with a family friend who is on the run.
Rifaat opened the session with a strongly worded statement before handing down the verdicts. He expressed deep sympathy for the uprising.
"The people released a collective sigh of relief after a nightmare that did not, as is customary, last for a night, but for almost 30 black, black, black years -- darkness that resembled a winter night.
"The revolution by the people of Egypt was inspired by God. They did not seek a luxurious life or to sit atop the world, but asked their politicians, rulers and those in authority to give them a decent life and a bite to eat," he said. "They peacefully demanded democracy from rulers who held a tight grip on power."
One of the uprising's key pro-democracy groups, April 6, rejected the verdict, saying Rifaat at once paid homage to the protesters and ignored the grief of the families of those killed by acquitting the top police commanders.
"We will continue to cleanse Egypt from corruption," the group said.
"Justice was not served," said Ramadan Ahmed, whose son was killed on Jan. 28 last year. "This is a sham," he said outside the courthouse, a lecture hall in a police academy that once bore Mubarak's name.
U.S.-based Human Rights Watch called the verdict a "landmark conviction" but criticized the prosecution for failing to fully investigate the case.
"It sends a powerful message to Egypt's future leaders that they are not above the law," HRW said. "These convictions set an important precedent since just over a year ago, seeing Mubarak as a defendant in a criminal court would have been unthinkable," said Joe Stork, the group's spokesman.
Angered by the acquittals of the Mubarak sons and six top police officers, lawyers for the victims' families broke out chanting inside the courtroom as soon as Rifaat finished reading the verdict.
"The people want to cleanse the judiciary," they chanted. Some raised banners that read: "God's verdict is execution."
The charges related to killing protesters carried a possible death sentence that the judge chose not to impose, opting instead to send Mubarak to prison for the rest of his life.
Rifaat criticized the prosecution's case, saying it lacked concrete and material evidence and that there was nothing in what has been presented to the court that proved that the protesters were killed by the police. Because those who pulled the trigger have not been arrested, he added, he could not convict any of the top police officers of complicity in the killing of the protesters.
The prosecution had complained during the trial that it did not receive any help from the Interior Ministry in its preparation for the case and, in some cases, prosecutors were met with obstruction.
Outside the courtroom on the outskirts of the capital, there was jubilation initially when the conviction was announced, with one man falling to his knees and prostrating himself in prayer on the pavement and others dancing, pumping fists in the air and shooting