Protesters in Suez set a government building on fire and tried to burn down a local office of Egypt's ruling party late on Wednesday, security sources and witnesses said.
Protesters threw petrol bombs at the National Democratic Party office but failed to set it alight. Police fired teargas to push the demonstrators back, they said.
Officials in the city in Egypt's northeast ordered that shops be closed after incidents of looting were reported.
Clashes with police left some 55 people injured.
Eyewitnesses reported that some protesters threw Molotov cocktails on a police station at al-Arbayen area in Suez, but Al-Masry Al-Youm could not confirm it independently.
