Firefighters extinguished a vehicle fire in Oroville Wednesday morning. CAL FIRE Butte Unit says the fire happened around 3 a.m. near Las Plumas Avenue. A person called in with one witness saying they saw a truck on fire and heard explosions. The witness said they heard at least two explosions before the fire department was on scene. Then there were two more explosions. CAL FIRE said there have been no injuries reported and the fire did not spread to nearby vegetation or structures.