A leader of the now outlawed Muslim Brotherhood has had his death sentence confirmed by a Cairo court this weekend. Mohamed Badie and 13 other defendants were handed their sentences as 37 people, including an American-Egyptian citizen were jailed for life. The defendants found guilty of plotting unrest from their headquarters in a sprawling Cairo protest camp in the months after the military overthrew Islamist president Mohamed Morsi in July 2013. Scroll down for video . Upheld: Egyptian Muslim Brotherhood leader Mohamed Badie, pictured at a trial earlier this year, has had his death sentence confirmed by a Cairo judge . Judge Mohamed Nagy Shehata, known for his harsh rulings in cases involving the Muslim Brotherhood, also sentenced two Islamists who have fled the country to death. Among those sentenced to life in prison is Mohamed Soltan, an American-Egyptian man who has been on a hunger strike over his detention for more than 14 months. Soltan's family called for Mohamed's immediate release in a statement after the verdict, charging that there was no evidence against him. His father Salah Soltan was among the 14 detainees sentenced to death. The U.S. embassy in Cairo said in a statement that it was 'gravely concerned' about Mohamed Soltan and would 'continue to monitor his case closely and to provide him with all possible support.' Sentenced: Egyptian Muslim Brotherhood leader Badie (front) and his fellow defendants were found guilty of plotting unrest in the months after the military overthrew Islamist president Mohamed Morsi in July 2013 . Ruling: Egyptian Judge Mohammed Nagi Shehata reads the verdicts in a cases in Cairo, on Saturday . The rulings can be appealed before the Court of Cassation, which has overturned dozens of other death sentences, including against Badie. So far Egypt has executed one Islamist sentenced to death after Morsi's overthrow, following his conviction of involvement in the murder of a youth during violent protests in July 2013. Judge Shehata read out a Koranic verse that stipulates amputation and crucifixion for outlaws, before rendering his verdict on Saturday. At a previous session, he had sought the opinion of the country's mufti, the Islamic legal authority who has an advisory role under Egyptian law, on the death sentences. Known as the 'Rabaa Operations Room' case, the prosecution accused the defendants of organising months of unrest and protests against the ouster of Morsi, a senior Brotherhood figure himself now on trial. The Rabaa al-Adawiya protest camp in Cairo was dispersed by police on August 14, 2013 in a 12-hour operation that left hundreds of protesters and about 10 policemen dead. Supporters of Egypt's ousted president Mohamed Morsi stand their ground as Egyptian security forces move in to disperse them by force from the Rabaa al-Adawiya protest camp in Cairo in August 2013 . Mohamed Soltan was shot in the arm during the dispersal, and he was arrested days later as police hunted down Islamist activists who had fled the protest camp. Police moved in to disperse the camp after weeks of failed European and US-brokered negotiations with the Brotherhood, who publicly insisted on Morsi's return. The Islamist was the country's first freely elected president and he ruled only for a year before the army toppled him, spurred by massive protests demanding his resignation. President Abdel Fattah al-Sisi, the former army chief who toppled Morsi and then won an election, has pledged to eradicate the Brotherhood. The government has blacklisted the movement as a terrorist organisation amid a spike in militant attacks that have killed dozens of policemen and soldiers. The deadliest attacks have been claimed by jihadists in the Sinai Peninsula and in Cairo, and the Brotherhood insists it is committed to non-violence. But decapitated and driven underground, the Islamist movement is believed to have radicalised with members adopting militant tactics against policemen.
Confirmed death sentences for Muslim Brotherhood leader and 13 others .
American-Egyptian citizen sentenced to life in prison by Cairo court .
Found guilty of  'plotting unrest' after ousting of president Morsi in 2013 .