Two people have shut down the Newcastle Coal Port on Awabakal and Worimi country in Mulubinba this morning, halting operations at a critical piece of Australia's economic infrastructure.

A community worker, 61 years of age, was locked onto a coal operating machine using a metal pipe and at the same time a law student, 23, entered the site and disabled operation of machines.

This is the 20th action to target the Port of Newcastle and surrounding railway in a series of disruptions over the last 11 days.

Blockade Australia is targeting the world's biggest coal port and the surrounding railway network to disrupt the operation of infrastructure vital to Australia, and draw attention to Australia's role in the climate and ecological crisis.