Trump supporters gather for 2020 Labour Day rally

Violence erupted at a rally in support of US President Donald Trump in Oregon on Monday.

Scores of Trump supporters gathered outside the State Capitol Building to show their support for the US President as he bids for a second term in the White House.

Counter-protesters clashed with Trump supporters at the rally with police making arrests, although it wasn't immediately known how many.

Vehicles waving flags for Trump, the QAnon conspiracy theory and in support of police gathered about noon at Clackamas Community College in Oregon City.

The rally’s organizers said they would drive to toward the state capital, Salem, and most left the caravan before that.

A smaller group of members of the right-wing group the Proud Boys went on to Salem, where a crowd of several dozen pro-Trump supporters had gathered.