Protesters have broken into the building housing Israel’s embassy in Egypt’s capital, Cairo, entering consular offices, officials said.
Security forces fired tear gas at the protesters who threw stones and petrol bombs at police vehicles. Israel’s ambassador has flown out of Egypt.
US President Barack Obama urged Egypt to protect the embassy after Israel asked Washington for help.
The mission has seen protests amid a downturn in Egypt-Israel relations.
The unrest began after Friday prayers, when thousands converged on Cairo’s Tahrir Square to demand faster political reforms following the ousting of former President Hosni Mubarak in February.
Later hundreds marched on the Israeli embassy. They destroyed a wall around the building, before a group of about 30 broke in and threw documents out of windows.