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When crowds demonstrating against the killing of unarmed African American teenager Michael Brown by police had tear gas used on them, Palestinians watching online sent messages of support.
They also offered tips for how best to deal with tear gas.
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Police also used sonic devices that made a loud ear-splitting sound to try to disperse the crowd in the town of Ferguson in St Louis, Missouri.
Demonstrators taunted the police. "We're not dogs, so what the hell you've got those whipping sticks for? Because you want to whip us like dogs," one protester said.
Michael Brown, 18, died on August 9 in a police shooting. His death has triggered rioting and stirred comparisons with the February 2012 fatal shooting of unarmed teenager Trayvon Martin in Florida.
The use of tear gas also brought suggestions from other parts of the Middle East.
