At least 83 supporters of ousted Egyptian president Mohammed Morsi were killed this weekend in clashes with police, the worst bloodshed since Morsi was removed from office at the beginning of this month, CBN News reports. Morsi's supporters say they will continue to take to the streets until he is reinstalled. Meanwhile, interim president Adli Mansour authorized Prime Minister Hazem al-Beblawi to allow the military to make civilian arrests. The National Defense Council, which includes Mansour, Beblawi, Interior Minister Mohammed Ibrahim and Gen. Abdel-Fattah al-Sissi, warned pro-Morsi activists "not to exceed their rights to peaceful, responsible expression of their opinions." They warned they could expect "decisive and firm decisions and actions in response to any violations," al-Jazeera reported. The United States is closely watching the steps being taken by its biggest Arab ally. "What we hope happens is the secular political movement has an opportunity to take root, which is exactly what didn't happen, and there was, candidly, no U.S. influence used there," said Rep. Mike Rogers, R-Mich. "We've got to try to calm things down," Rogers said. "It's to the benefit of the entire region and world and the United States' interest to have a calm and a sustained, I think, democracy grow in Egypt."