11.   Police quelled the riot with tear gas and a show of force that they defended Tuesday.

12.   Palestinian police fired on Israeli troops that were trying to quell the riots.

13.   Soldiers used live ammunition to quell the riot and shot a Palestinian policeman to death.

14.   Special Operations forces had to help quell a riot when Taliban prisoners rebelled, killing a CIA officer.

15.   The agent is dangerous when used indoors, other law-enforcement officers testified, and generally is used to quell riots outdoors.

16.   The Arab world has rallied to condemn what it regards as disproportionate Israeli force used to quell riots in Israel and the Palestinian territories.

17.   They have accused the military of failing to act to prevent and quell the riots.

18.   These days, Corps militias and armed police sometimes aid the army and civil authorities in quelling riots.

19.   Police sealed off the slum area, but did not intervene to quell the riot.

20.   Police stormed a camp firing tear gas Thursday to quell a riot by Vietnamese asylum-seekers resisting moves to send them home, Hong Kong radio said.