Two days later a police tear gas canister was fired into a mosque during Friday prayers.
In all over a ton of tear gas was used, many canisters aimed directly at demonstrators to cause maximum injury.
When a tear-gas canister was thrown into the basement the two men decided to surrender.
disperse the crowd with tear gas.
Police used tear gas to disperse the protesters, some of whom were wearing gas masks.
The raid uncovered one stun-gun, one tear-gas canister and one imitation handgun that fired blanks.
Police used bayonets and tear gas to break up the demonstration and to move students into their dorms.
Another riot was held that night in which tear gas and police force was used to break it up.
Many students ran away, but the guardsmen still fired tear gas into the crowds of students.
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