UPDATE:All lanes are now open on southbound I-75 following an earlier semi-truck fire that prompted police to block traffic. The southbound lanes on I-75 were closed for several hours while crews worked to extinguish the fire and clear the scene near the Norwood Lateral.Firefighters are at the scene of a tractor-trailer on fire on Interstate 75, Monday afternoon. According to the Ohio Department of Transportation, all lanes on southbound I-75 are closed at the Norwood Lateral due to semi-truck on fire. The ramp from westbound State Route 562 to southbound I-75 is also closed. ODOT camers show firefighters on scene working to extinguish the blaze. Stopped traffic is backed up to Paddock Road.It is unknown when all lanes will reopen to usual traffic. Motorists should expect delays. No further information has been released at this time. For live traffic updates, click here.Do you have photos or video of this incident? If so, upload them to https://www.wlwt.com/upload. Be sure to include your name and any additional details so we can give you proper credit online and on TV.