The rally was led by Prime Minister Peter O’Neill and his PNC Hela candidates, with the incumbent member for Tari-Pori and Finance Minister James Marape.
Reports on the ground say the Prime Minister was quickly whisked to safety when the crowd started throwing stones at each other, forcing the police to fire teargas.
The Hela Provincial Police Commander, Michael Welly, has confirmed the reports.
However, the PM’s officials say it is a minor incident between supporters of rival candidates.
This is the third reported disruption from the public at PNC rallies.