The Park County Sheriff's Office is investigating a wildfire that was reportedly started by fireworks shot from a moving vehicle on Saturday.The sheriff's office said in a social media post that around 7:30 p.m. Saturday a deputy on patrol reported a fast-spreading fire on Interstate 90 near Livingston. The fire, aided by warm temps and winds as high as 60 mph, was threatening nearby homes and buildings as it burned through dry grass. Emergency responders were dispatched and residents in the immediate area were evacuated, according to the sheriff's office.Firefighters gained full control of the fire after approximately 1.5 hours. Damage from the blaze spread across approximately 26 acres, including outbuildings and grazing land for cattle. No injuries were reported.Investigators obtained video evidence of a person discharging a firework that ignited the grass from a moving vehicle. The vehicle reportedly continued west on I-90 after sparking the fire.The sheriff's office said a criminal investigation is underway, but no arrests have been made. If you have information about the incident, contact the sheriff's office at 406-222-2050.