11.   Witnesses told investigators that Lewis chased the youth, caught him, picked him up and threw him down headfirst on to the pavement.

12.   Police arriving at the scene began chasing several youths believed responsible for the killing.

13.   After Aznar entered the research facility, police charged against the students, waving batons and firing rubber bullets as they chased the youths across the campus.

14.   At Khamayu junction, where several major roads intersect, about two dozen riot police were seen Saturday afternoon chasing some youths down narrow side streets.

15.   Officers burst into a department store to chase some youths who had sought refuge inside.

16.   Police chased the youths, beating and dragging away some of them.

17.   The troops fired into the air and chased the youths, who pelted them with stones and glass bottles.

18.   The spokeswoman said police fired two warning shots after a number of men chased two youths into a house and dragged one of them back out onto the road.

19.   Troops chased the youths and arrested two of them.

20.   Dozens of riot police and troops chased youths on the streets.