An Egyptian court sentenced prominent activist Ahmed Douma to life in prison on Wednesday, judicial sources said, part of a sustained crackdown on Islamist and liberal government opponents.

An Egyptian court sentenced prominent activist Ahmed Douma to life in prison on Wednesday, judicial sources said, part of a sustained crackdown on Islamist and liberal government opponents.

Douma, a leading figure in the pro-democracy revolt that toppled autocrat Hosni Mubarak, was convicted of rioting, inciting violence and attacking security forces in late 2011.

The court also sentenced 229 others to life in jail in absentia for the same charges, and 39 juveniles received 10-year sentences in absentia. Life sentences in Egypt last 25 years.

In Washington, US State Department spokeswoman Jen Psaki told reporters that the United States was "deeply troubled" by the life sentences.

"Mass trials and sentences run counter to the most basic democratic principles and due process under the law," she said. "It simply seems impossible that a fair review of evidence and testimony could be achieved under these circumstances."

Last year in a case that provoked international outcry, the judge, Mohamed Nagi Shehata, jailed three Al Jazeera journalists, including Australian Peter Greste, and he has sentenced hundreds of Muslim Brotherhood supporters to death. Greste was freed on Sunday after 400 days in a Cairo jail. {ID:nL6N0VB0M5]

Shehata runs a criminal court in Giza, a satellite city of Cairo, and has played a prominent role in the Egyptian judiciary's mass jailings of Islamist and liberal demonstrators since Islamist president Mohamed Mursi was deposed in mid-2013.

Douma was among protesters in Cairo and other cities who called on the military council that ruled Egypt for 18 months after Mubarak's ouster to give up power.

Like several other activists well-known in Egypt for their roles in the 2011 uprising, Douma has been jailed by every Egyptian leader since Mubarak: the military council, Mursi, and former army chief Abdel Fattah al-Sisi, who went on to become elected president.

When Shehata read his verdict, Douma laughed and clapped from his courtroom cage. The judge, who also fined Douma 17 million Egyptian pounds (US$2 million), then threatened to jail him for another three years for insulting the court.

According to courtroom witnesses, Douma then said, "This is enough. I am happy with the verdict."

Photos published on Egyptian websites showed Shehata, wearing sunglasses and with his arms crossed, sitting in a chair and staring at the smirking defendant.

In December, the same judge sentenced Douma to three years in jail after he accused Shehata of bias and denounced as political his trial on charges of violence against the state.

Last month, a separate court handed down a three-year jail term for Douma and activists Ahmed Maher and Mohamed Adel.

Reuters