BOISE, Idaho – The Ada County Sheriff's Office announced Monday that a grass fire in southeast Boise that burned about 100 acres was caused by mortar fire.

The sheriff's office said it was called to the Lydle Fire along with the Bureau of Land Management (BLM) around 4 p.m. on Friday, June 28. A 16-year-old called 911 with friends to report the fire after they set off fireworks, according to officials.

After the fireworks ignited the area's dry grass and brush, the group called police and attempted to extinguish the flames, but to no avail. The teen was charged with the misdemeanor of burning wood on prairie land and released, according to the Ada County Sheriff's Office.

According to BLM Idaho Fire, the Lydle Fire, which started in the area of ​​East Plexi Court and South Leeds Lane, was under control by about 6 p.m. on June 28. BLM responded to the fire with a bulldozer, fire truck, helicopter, fire inspector and four fire trucks.

Setting off fireworks on BLM land is prohibited, the sheriff's office said. However, the Ada County Board of Commissioners banned the setting off of fireworks in unincorporated areas earlier this month. The ban applies outside the city limits of Boise, Eagle, Garden City, Kuna, Meridian and Star.

The Ada County Sheriff's Office said violations of the fireworks ban could result in misdemeanors. Click here for more information and an interactive map of the ban.

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