Crews were called out to McKenzie and Calaveras after 11 pm on Monday.FRESNO, Calif. (KFSN) -- Officials are investigating a suspicious fire that broke out in central Fresno.Crews were called out to McKenzie and Calaveras after 11 pm on Monday.[Ads /]Firefighters found a mattress on fire in a room of an abandoned house.It's the second consecutive week fire crews have been called to the location.[Ads /] Report a correction or typo