JOHANNESBURG - Three trucks were set alight on Wednesday night on the N3 highway in Vosloorus.
Suspects blocked the road, opened fire on drivers, and attempted to hijack the vehicles.
Gauteng police have opened cases of attempted murder and malicious damage to property following the incident.
Authorities say the trucks and their cargo were completely destroyed in the blaze.
According to police, the drivers came across vehicles blocking the highway.
When they stopped, suspects began shooting at the trucks in an apparent hijacking attempt.
All three drivers managed to escape unharmed.
No arrests have been made at this stage.
Gauteng Provincial Commissioner Lieutenant General Tommy Mthombeni has condemned the attack, saying such acts of lawlessness will not be tolerated and that those responsible will be brought to justice.