Seven people have been killed in clashes between supporters of toppled Egyptian president Mohammed Morsi and police in Cairo, a Health Ministry official said Tuesday, dpa reported.
Police late Monday fired teargas at pro-Morsi protesters who had blocked a bridge in the capital, sparking the violence.
Clashes also erupted in two other areas of the capital.
The official added that 260 people were also injured in clashes that coincided with talks between visiting US Deputy Secretary of State William Burns and Egypt's interim leader. It was the first visit by a US official since the army overthrew Morsi on July 3.
Supporters of the Muslim Brotherhood group have vowed to continue protesting until Morsi's reinstatement.
The army removed Morsi, the country's first democratically elected president, after millions rallied nationwide demanding his removal. The army chief has defended his decision by saying the military heeded the will of the people.
There are mounting concerns that Egypt could slide into a civil war.