An Egyptian court sentenced Mohamed Badie, the leader of the outlawed Muslim Brotherhood, and 13 other senior members of the group to death for inciting chaos and violence, a judge said in a televised session on Saturday.
The court also sentenced US-Egyptian citizen Mohamed Soltan to life in jail for supporting the group and transmitting false news. He is the son of Brotherhood preacher Salah Soltan, who was among those sentenced to death on Saturday.
The sentences can be appealed before Egypt's highest civilian court in a process that could take years to reach a final verdict. The men were among thousands detained after the ousting of Islamist President Mohamed Mursi in 2013.
Egypt's mass trials of Brotherhood supporters have drawn international criticism of the country's judicial system.
President Abdel Fattah al-Sisi, who as army chief toppled Mursi following mass street protests, describes the Brotherhood as a major security threat. The Brotherhood says it is committed to peaceful activism and had nothing to do with recent Islamist militant violence in the country.