"We condemn the violence that has taken place today in Egypt. We call on all Egyptian leaders to condemn the use of force and to prevent further violence among their supporters," the State Department spokesperson, Jen Psaki, said.
At least 17 people died in violence as supporters of the deposed Egyptian President, clashed across the country with those celebrating his ouster.
Hundreds were said to be have been injured.
"As President Obama said, we expect the military to ensure that the rights of all Egyptians are protected, including the right to peaceful assembly, and we call on all who are protesting to do so peacefully," she said.
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The Egyptian people must come together to resolve their differences peacefully, without recourse to violence or the use of force," Psaki said.
According to The New York Times, witnesses said they saw at least five pro-Morsi demonstrators killed and many more wounded in gunfire outside the Republican Guard compound where Morsi was believed to be detained, as thousands confronted a phalanx of armed soldiers, armoured vehicles and barbed wire ringing the facility.