CAIRO : An Egyptian appeals court on Saturday upheld a life sentence against the Muslim Brotherhood's supreme guide Mohamed Badie for "planning violent attacks", judicial officials and his lawyer said.

The Court of Cassation also upheld life sentences against two other Brotherhood leaders including Mahmoud Ghozlan, a Brotherhood spokesman, along with five-year prison terms for 14 others, defence lawyer Abdel Moneim Abdel Maksoud told AFP.

8 soldiers, 14 militants killed in Sinai attack

Egypt's army said militants wearing explosive belts tried to storm a military camp in the Sinai Peninsula on Saturday in an assault that left eight soldiers and 14 attackers dead.

The militants blew themselves up outside the camp after they were prevented by security forces from entering, an army statement said.

"The armed forces were able today to foil a large terrorist operation," the military said.

Militants who have declared allegiance to the Islamic State group (IS) have killed hundreds of soldiers and policemen in the Sinai since the military ousted Islamist president Mohamed Morsi in 2013, following mass protests against him.

More than 100 militants and at least 22 soldiers have been killed in an ongoing operation launched on February 9 against the militants, according to army figures.