The Guardian reports: Egyptian cities were left strewn with rocks, glass and bullet casings on Saturday morning after almost 24 hours of violence which left 30 dead and more than 1,100 injured.

Clashes erupted on Friday night between supporters and opponents of ousted president Mohamed Morsi in central Cairo and other cities across Egypt , as fears of an expected backlash against his removal materialised.

Fighting broke out shortly after the Muslim Brotherhood’s spiritual leader, Mohammed Badie – reported to have been arrested on Thursday – appeared unexpectedly at a rally in east Cairo on Friday evening to tell his followers to remain on the streets until Morsi’s return. The ousted president had once been a senior member of the Islamist party.

In Cairo, a crowd of close to 5,000 Morsi supporters crossed the Nile over the 6 October Bridge, near the hub of opposition dissent, Tahrir Square. Turning left towards Maspero, the state television centre, they were approached by anti-Morsi demonstrators and fighting broke out in the streets.

Similar scenes were also reported in Egypt’s second city, Alexandria, and there were reports of skirmishes in Luxor in the south of the country. The Sinai peninsula was placed on a state of emergency after an attack by gunmen on a local airport. There were also clashes reported in Damanhour, in Egypt’s north-east, and Beni Suef, in the south, as Islamists protested across the country at Morsi’s removal – in what the Brotherhood and other Islamist groups had billed as a “day of rejection”.