The Mendocino County Sheriff’s Office is investigating a mobile home fire as arson. Saturday night, Deputies were dispatched to the 4800 block of North State Street in Ukiah about a man who was possibly intoxicated and acting strange. Soon after, MCSO got another call that the man lit a fire inside of a residence. It was determined that Pedro Reynaga, who lived in the residence with his mother had intentionally set the fire. His mother was not home at the time.