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Political liberal and Nobel Peace Prize laureate Mohammed ElBaradei was named Egypt's interim prime minister on Saturday, a spokesman for the alliance he coordinates told Efe.

He was to be sworn in Saturday at the presidential palace in Cairo, Khaled Dawoud, spokesman for the National Salvation Front, the country's leading non-Islamist political alliance, said.

The nation's interim president, Adli Mansour, offered the 71-year-old ElBaradei the position during a meeting Saturday afternoon, a day after three-dozen people were killed in street clashes in the wake of a military coup.

ElBaradei's name had been mentioned as a possible successor to Hisham Qandil, an Islamist who was in office until Wednesday's coup that deposed President Mohammed Morsi.

The former director general of the International Atomic Energy Agency was awarded the Nobel Peace Prize in 2005, jointly with the organization he headed, for his efforts to prevent nuclear energy from being used for military purposes.

His appointment comes amid a severe political crisis in the North African nation and was roundly rejected by Morsi's Muslim Brotherhood movement.

In a statement on its Web site, the MB said it considered the appointment of ElBaradei as a "prize" for his "role in planning the coup" that ousted Morsi.

At least 35 people were killed and 1,400 others were wounded during violent clashes in different parts of Egypt on Friday, when supporters and opponents of Morsi held rival mass demonstrations.

At least four people were killed outside the headquarters of the Republican Guard in Cairo, where Islamist protesters believe Morsi is being held, according to the Attorney General's Office.

Calm was restored on Saturday but tensions were still running high.

Morsi's Islamist supporters have held protests since the coup, when the armed forces suspended the constitution that he enacted during his abbreviated term in office and named Mansour, the head of the Supreme Constitutional Court, as interim head of state pending fresh elections.

The military acted following days of massive anti-government protests.

Critics accused Morsi and the Brotherhood of doing little to address poverty and Egypt's struggling economy, of failing to advance the goals of the 2011 revolution that forced out strongman Hosni Mubarak and of seeking to monopolize power.

In its statement earlier Saturday, the MB demanded the punishment of security forces responsible for "murdering demonstrators, arresting political leaders and shuttering satellite television channels."

Among the MB leaders arrested in recent days is the group's No. 2, Khairat El-Shater, who was detained Friday for allegedly inciting his followers to kill rival demonstrators.

Authorities also ordered the arrest of the Brotherhood's top leader, General Guide Mohammed Badie, although he was seen in public Friday speaking to a large crowd of Islamists who had gathered at a Cairo square to show their support for Morsi. EFE