21.   Police said an argument between supporters of rival parties sparked the riot.

22.   A dock worker died a few days after cleaning the hold of the ship that transported the waste, sparking riots in Sihanoukville.

23.   A Jewish extremist who sparked Palestinian riots by posting drawings of the Muslim prophet Mohammed as a pig on Wednesday was ordered back to jail for violating parole.

24.   A loss could spark riots.

25.   A month after the police shooting of an unarmed black man sparked riots, the Justice Department opened an investigation Monday into whether officers routinely use excessive force.

26.   A police spokesman said the riot was apparently sparked when a gang of white youths attacked homes belonging to Asians in Oldham, on the outskirts of Manchester.

27.   A recent peso devaluation and increases in the price of gas have sparked sporadic riots since December.

28.   A sharp increase in bread prices sparked riots in August.

29.   Also last month, the government imposed a dusk-to-dawn curfew in the southern city of Owerri after a series of alleged ritual killings sparked riots.

30.   Attempts to build on a four-acre plot of land Moskowitz owns outside the Old City walls have sparked violent riots between Palestinian residents and Israeli troops.