A structure fire in North Sacramento is being called suspicious after an unoccupied home and multiple sheds caught fire Sunday morning. Sacramento Fire Battalion Chief Rusty Van Vuren said a crew first noticed a column of smoke while leaving a medical aid call on Railroad Drive. Van Vuren said the crew made their way toward the smoke when dispatch called out about a house fire. The crew arrived at the fire on the 200 block of Redwood Avenue to find the home and garage fully involved. Van Vuren said the crew began their initial attack as other crews arrived. The firefight was increasingly difficult because of the red flag conditions with high winds, and SMUD power lines were down in the alley. “There are definitely suspicious circumstances to this fire, the cause will be under investigation,” Van Vuren said.