At least 37 people have died across Egypt as tens of thousands of Muslim Brotherhood supporters clashed with vigilante residents in the fiercest street battles to engulf Cairo since the country’s Arab Spring uprising.

The chief justice of Egypt’s Supreme Constitutional Court was sworn in as interim president, taking over hours after the military ousted Islamist president Mohammed Morsi.

The supreme leader of Egypt’s Muslim Brotherhood has been arrested and flown to Cairo on a military helicopter, security officials say.

Egyptian shepherd Mokhtar Adam Fadl was sleeping soundly beside his flock when he was shot dead - by one of his sheep.