BATON ROUGE - The eastbound lanes of the Mississippi River Bridge were shut down as firefighters and other first responders work to clear the remnants of a semi truck that caught on fire Wednesday evening. 

The fire started just before 7 p.m. Large flames shot up from the vehicle as cars passed on the other side of the bridge. 

Firefighters were able to extinguish the blaze minutes after their arrival. Baton Rouge Fire Department officials said there are no reported injuries. 

All lanes were open at 8:20 p.m. 

It is unclear what started the fire.