EGYPT’S highest civilian court has upheld death sentences against 12 senior Muslim Brotherhood figures over a 2013 sit-in which ended with security forces killing hundreds of protesters, judicial sources said. The ruling, which cannot be appealed against, means the 12 men could face execution pending approval by President Abdel Fattah al-Sisi. They include Abdul Rahman Al-Bar, commonly described as the group's mufti or top religious scholar, Mohamed El-Beltagi, a former member of parliament, and Osama Yassin, a former minister. Many Muslim Brotherhood figures have been sentenced to death in other cases related to the unrest that followed the military's ousting…