Coal trains cannot drop freight at the Port Of Newcastle this morning after a climate activist blocked a key bridge.
A woman from the Blockade Australia group has been hanging from a bridge near the Kooragang Island terminals since 7am.
Suspended in a harness connected high on the bridge, she is carrying a large chain and said she will not come down willingly.
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The woman said police arrived to the scene about 7.45am.
The Port of Newcastle is one of the largest coal ports in the world.
It exported an estimated 136 million tonnes of coal last year.
Anti-coal activists from Blockade Australia have shut down coal export operations at the port in previous protests.
Police said an operation was underway after they were alerted about 7.15am to the incident at Wagtail Way Kooragang.
They said a small group had congregated near the bridge.
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