An Egyptian court Monday sentenced 139 Islamist supporters of ousted president Mohammed Morsi to two years in jail over violence that erupted in July, state news agency MENA reported.

MENA said the sentences could be subject to appeal, while the defendants, who are currently in custody, could each be bailed for 5,000 Egyptian pounds ($700 or 550 euros).

Egypt urged Arab League members Monday to enforce a counter terrorism treaty that would block funding and support for the Muslim Brotherhood after Cairo designated it as "terrorist" group.

Cairo also wants the League's members to hand over wanted Islamists linked to the Brotherhood to which deposed president Mohammed Morsi belongs.

Egyptian secret police have arrested an award-winning Australian journalist and an Egyptian reporter for the Qatar-based Al-Jazeera channel on suspicion of illegally broadcasting news harming "domestic security,” the interior ministry said.

Officers of the National Security service raided their makeshift bureau at a Cairo hotel on Sunday, arresting the two and confiscating their equipment, the ministry said in a statement.

A bomb near an army intelligence building wounded four soldiers Sunday, the third such blast within a week in Egypt after the Muslim Brotherhood's terrorist designation further polarized the country.

The explosion, which the army said was a "cowardly terrorist" act, comes as the military-installed authorities plan to hold a referendum on a new constitution next month -- the first step toward democracy since the ouster of Islamist President Mohammed Morsi in July.

A student was killed and more than 100 arrested as police clashed with students who set fire to Cairo university building on Saturday, in an intensifying crackdown on the Muslim Brotherhood, officials said.

The unrest followed nationwide repression of Islamist protests on Friday after the military-installed government listed the Brotherhood, the movement of deposed president Mohammed Morsi, as a terrorist organisation.

U.S. Secretary of State John Kerry expressed concern Thursday over Egypt's intensified crackdown on the Muslim Brotherhood after the military-installed government declared it a terrorist group.

In a phone call with his counterpart in Cairo Nabil Fahmy, Kerry condemned a suicide bombing in Mansoura on Tuesday and Thursday's bus bombing in Cairo, State Department spokeswoman Jen Psaki said in a statement.

The military-installed government's listing of Egypt's Muslim Brotherhood as a terrorist group signals determination to uproot its vast grass-roots network, possibly radicalizing the Islamists as they go underground, analysts said.

Security forces had already decimated the group following Islamist president Mohammed Morsi's overthrow in July, with more than 1,000 people killed and thousands more imprisoned, including the Brotherhood's top leadership.

Egyptian prosecutors ordered at least 18 Muslim Brotherhood members, including an ex-lawmaker, held on accusations of belonging to a terrorist group, a day after the government blacklisted the movement, state media reported.

They include the son of a deputy leader of deposed president Mohammed Morsi's movement, which the government declared yesterday a terrorist organisation, the official MENA news agency said.

Egypt's army chief General Abdel Fattah al-Sisi, who led the ouster of Islamist president Mohamed Morsi, vowed Thursday to fight terrorism and stabilize the deeply polarized country.

"Do not worry or fear, the army will sacrifice for Egypt. We will eliminate" terrorism, Sisi said at a military ceremony, in his first comments after Egypt was rocked by two bomb attacks this week.

Egypt's Muslim Brotherhood faces its toughest trial in decades after being declared a "terrorist" group following a spectacular fall from power, with its leaders imprisoned or on the run.

The 85-year-old Islamist movement, which was the most well-organized opposition group during decades of authoritarianism despite being banned, stepped out of the shadows after the 2011 uprising that ended Hosni Mubarak's 30-year-rule.