Tahrir Battleground: Protest over Morsi 'power grab' turns deadly. (VIDEO)

Mass protests across Egypt against what's seen as a power grab by President Mohammad Morsi have now turned deadly. A teenager was killed on Sunday and dozens injured during the clashes.

Police fired tear gas at rallying crowds with the opposition staging a sit-in at Tahrir Square. Cairo-based journalist Bel Trew has the details.