Egypt tense on third anniversary of revolution

Rival political groups in Egypt are to mark the third anniversary of the 2011 uprising which ended in the overthrow of President Hosni Mubarak.

Both supporters of the military-backed government and the Muslim Brotherhood are set to take to the streets.

The anniversary comes as tensions were heightened by a series of bombs in Cairo and clashes across the country which left at least 18 people dead.

Catharina Moh reports.