This caused the busses and taxis to go on strike around 8am disrupting the bus services.
The operators, mostly from Mt Hagen told PNG Loop that they will cease services until the culprits are dealt with by police.
Five police units turned up at roundabout and calmed tensions advising drivers to go to Gordon station and submit an official complaint.
Bus operator Stanley Mond said they are planning to convoy to Gordon then on wards to Unagi oval.
PNG Loop has received conflicting information where drivers claimed they were attacked without provocation.