'Blockade Australia' protesters disrupted morning traffic in Sydney on Monday morning for over an hour.
According to local police, 10 people were arrested.
In a written statement, they said that one protester blocked city bound lanes of a Sydney Harbour tunnel with her car and chained herself by the neck to the car's steering wheel.
The protester's car was removed by police.
About 50 protesters marched through some of the streets in the city centre to disrupt traffic.
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Blockade Australia says it's trying to raise awareness about climate change and calling for further action by leaders.