1.   Fighting between rival gangs left dozens of people injured.

2.   Fighting between rival gangs resulted in the death of a teenage boy.

3.   Fighting broke out between two rival gangs.

4.   He was killed by rival gang members.

5.   His life is devoted to fights with rival gangs, stabbing, mugging, drinking and taking drugs.

6.   His murder was a reprisal for an injury to a rival gang member.

7.   Looking out over the crowd, I could see members of rival gangs.

8.   Rico had been shot by a member of a rival gang.

9.   The fight started as an argument between rival gang members.

10.   The school is in the thick of a war zone between two rival gangs.