Travellers to Egypt continue to be urged to stay away from demonstrations as at least 70 people were killed in fighting between rival groups in Cairo.

The Foreign & Commonwealth Office maintains its advice against all but essential travel to all areas with the exception of the Red Sea resorts of Sharm el Sheikh, Taba, Nuweiba and Dahab.

This came as Egypt’s new foreign minister Nabil Fahmy urged restraint, telling the BBC that all sides “need to stop inciting violence and using violence”.

Supporters of the ousted president Mohammed Morsi clashed with security forces on Saturday and thousands are continuing a sit-in at a mosque in the capital.

Interim president Adly Mansour has reportedly authorised his prime minister to grant the army powers to arrest civilians.

Responding to criticism that some members of the army and police had gone too far on Saturday, Fahmy was reported as saying: “If you have people shooting each other on both sides then you’re obviously going to have to casualties.”

The government initially denied that security forces fired live rounds on Saturday, saying only tear gas had been used.