Update 9 a.m.
Billings fire officials said the brush fire on Norm's Island "has been mitigated."
The island and the Audubon Center are open to the public, the agency said in a social media post.
Web Extra: Video from the scene at Norm's Island
"Please be aware you will see Billings Fire Department units and personnel monitoring the area throughout the day."
The cause of the fire has not been released.
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First Report
BILLINGS - A brush fire forced the closure of Norm's Island in Billings on Monday morning.
The Billings Fire Department said in a social media post shortly after 7 a.m. that the park area is closed to the public as fire crews work to contain the blaze "and ensure the safety of the surrounding area."
More information will be released as it becomes available, the post states.