1.   Riot police in armored cars arrived to disperse the crowd.

2.   The clash lasted for hours until police reinforcements arrived to disperse the assailants, it said.

3.   The protesters had been demonstrating peacefully for more than an hour Monday before police arrived to disperse them.

4.   The protesters threw stones at police and security forces who had arrived to disperse them, the witnesses said on condition of anonymity.

5.   Four rebel soldiers arrived to disperse a crowd.