The same can be said of the US where tear gas cannisters have been fired into the faces of peaceful demonstrators causing permanent brain damage.

"They had gas cannisters," he explained, the kind used for cooking stoves.

Tony sprinted back to the Mole and came back uphill more slowly, carrying his shirt and the gas cannister.

The others had split into three different parties, each group with a small gas cannister.

Tear gas cannisters broke into the mob.

I have a tear gas cannister, and rubber bullets that can put people's eyes out.

When 60 mainly white faculty members joined the crowd, they were bombarded with tear gas cannisters.

The troops, who are equipped with riot control gear, fired tear gas cannisters to drive them back.

On 29 May, Orsal was injured by police when he was struck in the head by a gas cannister.

When one man hurled an empty gas cannister back, people admonished him.