A fast-moving brush fire east of Lake Pleasant had grown to about 200 acres Wednesday afternoon near New River and Saddle Mountain roads in north Phoenix, officials said. 

The New River Fire jumped New River Road and crews are working to “catch” it, the Arizona State Forestry Department tweeted around 3 p.m. Wednesday. The tweet estimated the fire at 200 acres, but Phoenix fire officials later said it had exceeded that. No updated figure was immediately available.

The agency previously tweeted around 2 p.m. that the fire was 75 acres with a high rate of spread and 8-foot flames.

Westbound traffic on New River Road was shut down at Interstate 17, the Arizona Department of Transportation said.

Nearly 100 firefighters are battling the brush fire, Phoenix Fire Department Capt. Kenny Overton wrote in an email. An air tanker also was called to help suppress the fire.

The Phoenix, Daisy Mountain and Peoria fire departments, as well as the Bureau of Land Management, are among crews battling the fire, according to Overton.

Overton said no structures were threatened, however, one firefighter sustained a minor injury and was transported to a hospital in stable condition. 

This is a developing story. Check back with azcentral.com for updates.

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