Egypt's highest appeals court has upheld the acquittal of 24 loyalists of ousted President Hosni Mubarak tried for organizing the 'Battle of the Camel,' an attack on protesters that was a pivotal moment in the country's 2011 uprising.

Judge Hamed Abdullah's decision Wednesday against the prosecution's appeal raises calls for new investigations into the Feb. 2, 2011 assault, in which pro-Mubarak supporters charged into a sit-in in Cairo's Tahrir Square on camels and horses, setting off clashes that lasted into the next day and left nearly a dozen dead.

Judges argued witnesses were unreliable and evidence against the defendants, some of the biggest names in the Mubarak regime, was weak, a common explanation in the trials of officials held responsible for the killing of over 800 protesters during the uprising.