Egypt has hanged four men convicted by a military court of killing three military students in a bombing in 2015, security sources said on Tuesday.

It was the second reported multiple execution of convicted militants in a week. A week ago Egypt hanged 15 men accused of deadly attacks in the Sinai peninsula, believed to be the largest number of people executed in a single day since President Abdel Fateh Al Sisi took power.

The latest executions were carried out in the Borg Al Arab prison, west of the coastal city of Alexandria, after the military appeals court rejected appeals by the defendants, the sources said.

The four were hanged for their role in a bombing in the Nile Delta town of Kafr Al Sheikh that took place during violence that followed the ouster of president Mohamed Morsi of the Muslim Brotherhood. Sisi, then the military chief, removed Mursi in mid-2013 after mass protests against Morsi's rule.

The court also sentenced three others in absentia to death, and jailed eight others, including Salah Al Feki, head of the Muslim Brotherhood's administrative office in Kafr Al Sheikh.

Authorities banned the Brotherhood and declared it a terrorist organisation after Morsi was deposed, arresting thousands of its members and supporters.

Since then, Egypt has faced a growing insurgency from IS militants in the Sinai Peninsula