SACRAMENTO (CBS13) – A 2-alarm grass fire near Sutter’s Landing is spilling smoke over Business 80, forcing lane closures to the busy freeway.

The fire is near 28th and C Streets. No structures are threatened, a Sacramento City Fire official tells CBS13.

Heavy smoke from the fire is blowing across Business 80, forcing California Highway Patrol to reduce lanes along eastbound side of the freeway. Motorists should expect heavy traffic through the area, CHP warns.

It is unknown at this time how the fire started.