1. Police used tear gas to put the riot down.

2. Police used water cannon and tear gas against demonstrators.

3. Police used tear gas to disperse the demonstrators.

4. Police used tear gas to disperse the crowd.

5. Police used tear gas to disperse the crowds.

6. Riot police used water cannon and tear gas to disperse the crowd.

7. The police fired tear gas canisters into the crowd.

8. The army responded with gunfire and tear gas.

9. Riot police fired tear gas into the crowd.

10. Police fired tear gas canisters into the crowd.

11. The police used tear gas to break up the demonstration.

12. The only way to kurb this unruly mob is to use tear gas.

13. The initial cloud of tear gas had hardly cleared before shots were fired.

14. Troops used tear gas and rifle butts to break up the protests.

15. Riot police hurled tear gas canisters and smoke bombs into the crowd.

16. The only way to curb this unruly mob is to use tear gas.

17. The demonstrators threw stones and the police responded with tear gas.

18. Troops fired tear gas and shots to disperse a crowd of 15,000 demonstrators.

19. Farmers threw eggs and empty bottles at police, who replied with tear gas.

20. When the crowd started throwing stones, the police waded in with tear gas.

21. Police started to launch tear gases and pepper gases.

22. Polices started to launch tear gases and pepper gases.