Opposition Leader Bill Shorten says there's no way he'll support government money going to Adani to help the Indian miner get its Queensland coal mine off the ground.
Adani's planned mine has dominated a community meeting Mr Shorten attended in Townsville on Monday night.
"If they want to use EFIC (the Export Finance and Investment Corporation) or any other form of government funding body to get the money - no, no, no," he told the crowd.
There were tense scenes outside the meeting at the Currajong State School when a man scuffled with anti-Adani protesters.
Police were called and a 53-year-old man was issued with a notice to front court on three counts of common assault.
The mine is a divisive issue in Townsville, which is one of two fly-in, fly-out bases for the Galilee basin coal mine.
Some want the jobs Adani has promised, but others view the mine as an environmental disaster.