1.   The three-day summit was marred by clashes between police and protesters hurling firebombs and chunks of concrete.

2.   But the celebration was marred by clashes between drunken soccer fans, Parisian youths and riot police.

3.   Elsewhere in the West Bank, festivities were marred by clashes with Israeli troops.

4.   It was much better than the first day of his trip, which was marred by clashes between anti-British demonstrators and police.

5.   Last year at the Western Wall, Shavuot was marred by clashes between ultra-Orthodox and Conservative Jews.

6.   Last year at the Western Wall Shavuot was marred by clashes between ultra-Orthodox and Conservative Jews.

7.   Meetings across the country of her One Nation political party have been marred by clashes between anti-racism protesters, her supporters and police.

8.   Minor clashes marred a game between Panionios Athens and OFI Crete at the Nea Smyrni stadium.

9.   Several by-elections for parliamentary seats in the past year have been marred by clashes between rival youth groups.

10.   Sporadic clashes have marred peace negotiations.