A grass fire on the Southeast Side delayed traffic on Interstate 37 Wednesday evening.

The fire was sparked by flames from a truck that also caught fire on the side of the road. 

The burning truck was in the southbound lanes of I-37 near the exit to South New Braunfels Avenue when it went up in flames around 7 p.m. 

No injuries were reported, but traffic was backed up while firefighters put out the flames and cleared the scene.