A high school student was killed when opponents and supporters of deposed Egyptian president Mohamed Mursi clashed in the city of Suez on Wednesday night, medical and security sources said.
The two sides exchanged gun fire and threw petrol bombs after supporters of the Muslim Brotherhood's Mursi chanted anti-army slogans as they marched in the city, the sources said.
Abdullah Mohamed Attia, 17, died from a bullet wound, the state news agency reported, after both sides exchanged gunfire and threw petrol bombs.
The student was a supporter of Mursi, the Brotherhood's Freedom and Justice party said in a statement.
The European Union's foreign policy chief is in Cairo this week to encourage reconciliation between the Brotherhood and the government installed after the army removed Mursi on July 3 following mass protests against his rule.
Since Mursi's downfall, security forces have killed hundreds of pro-Mursi protesters, and senior members of the Brotherhood have been arrested, actions that drastically reduced the size of protests.