Bushfire burning in the Gila River in Avondale

AVONDALE, Ariz. — Crews are battling a brush fire at the bottom of the Agua Fria River in Avondale.

The fire is on the north side of Interstate 10 near the Dysart Road exit.

The Avondale Fire Department says they and other departments were called to the scene at 8:10 p.m.

When crews arrived on scene, the fire was only 100 feet by 100 feet, but Sky12 video shows the fire grew.

The department says the fire is in a difficult-to-access area and is burning slowly.

No structures are threatened and no one was injured.

It is not yet known what caused the fire.

This is a developing story and more details will be added as they become available.

>> Download it 12News application for the latest local news straight to your phone.

Now you can watch 12News content anytime, anywhere with the 12News+ app!

12News' free 12News+ app allows users to stream live events, including daily newscasts like “Today in AZ” and “12 News” and our daily lifestyle program, “Arizona Midday” — on Roku and Amazon Fire TV.

12News+ features live video throughout the day for breaking news, local news, weather, and even an occasional moment of zen featuring breathtaking views from across Arizona.

Users can also watch on-demand videos about breaking news, local politics, I-Team investigations, Arizona-specific features and vintage videos from the 12News archives.

Roku: Add the channel from the Roku store or by searching for “12 News KPNX.”

Amazon Fire TV: Search “12 News KPNX” to find the free 12News+ app to add to your account, or have the 12News+ app delivered directly to your Amazon Fire TV via Amazon.com or the Amazon app.

Keep up to date with the latest news and stories on the 12News YouTube channel. Subscribe today.