UPDATE: Interstate 75 northbound near East Brainerd Road has re-opened after a semi fire early Thursday morning.

PREVIOUS STORY: A semi caught fire early Thursday morning and is blocking several northbound lanes on I-75.

The fire started around 4 a.m. and is just past the East Ridge exit.

Right now it's not clear what the semi is hauling.

Stay with Channel 3 as this story develops.