Traffic is being slowed in both directions on Highway 3A, due to a semi-truck rollover at Yellow Lake. 

Witnesses say the incident occurred just before 1:30 p.m., with plumes of smoke visible from nearby residences. 

The highway was briefly closed, but has since reopened to single-lane, alternating traffic.

Fire and ambulance crews remain at the scene.

The tractor trailer was travelling eastbound and was the only vehicle involved.

Castanet will update as more information becomes available.