11.   Several gangs operate in the area, Lee said, and drive-by shootings have been a problem.

12.   Smaller Chinese gangs operate on the fringes, moving mostly in areas like San Francisco or New York that have large Asian communities.

13.   The gangs often operate with the help of the so-called Bosnian Croat special police, who are really part of the Bosnian Croat army, Foley said.

14.   The gangs operate with impunity because no victims testify and no witnesses come forward for fear of even more vicious retaliation.

15.   This is gang school, where officers who are seeing evidence of rising gang activity in their cities or suburban areas learn how gangs operate.

16.   We now have very sophisticated drug gangs operating out of Mexico.

17.   But Palawan provincial police chief Marcelo Santos Elli on Wednesday angrily denied that such a gang operated in the province.

18.   Criminal gangs operate with impunity in Russian cities, and disputes over the businesses they control often are settled by shootings or bombings.

19.   Despite the end of the war, many armed gangs still operate in Chechnya outside the control of the separatist government and have been blamed in periodic attacks.

20.   Gangs operate in other parts of South Africa.