A dozen people were killed at a protest held by supporters of Egypt's ousted president Mohamed Morsi, in Cairo, Friday.
As Millions rally across the country, thousands of Morsi supporters turned up at Cairo's Tahrir Square demanding Morsi's release from the detention and reinstate.
Late Friday night, police used tear gas to disperse the pro-Morsi protesters. Speaking to the private TV state al-Hayat, Egypt's interim President, Adly Mansour warned the new government will not accept lawlessness, blocked roads and attacks on state institutions, urging Pro-Morsi-demonstrators to go home.
"I can't negotiate with whoever has committed a crime. But those who were duped or those who want to belong to Egyptian society, we welcome them," said Adly Mansour.
"The state must interfere (against lawlessness) firmly," added Adly.
Morsi had been not seen since he was deposed by the military, July 3 following massive protests that demanded his resignation.
Morsi's Muslim Brotherhood members had rejected the interim government and lead more protests against the military.
The European Union, the United Nations as well as Washington had urged the interim government to release Morsi and hand over the leadership to an elected democratic government.
"An inclusive and sustainable democracy where all sectors of society, where all Egyptian people are fully represented, will represent all sides. And we feel that includes of course the Muslim Brotherhood and other representatives that have been detained," said U.S. State Department spokeswoman Jen Psaki.
More recently, the U.S. decided to delay the delivery of four F-16 jet aids to Egypt due to mounting political turmoil in the region. It is in the process of examining if Morsi's expulsion was a coup. If confirmed, it would trigger a legal requirement to cease providing aid to the country.