California fire officials say they've arrested a couple suspected of setting dozens of grass fires, including one that destroyed a home near Yosemite National Park. State fire spokesman Daniel Berlant says 40-year-old Kenneth Alan Jackson and 46-year-old Allison Marie Waterman of Coarsegold were arrested Tuesday night and remain jailed in Madera County. Berlant says they're suspected of setting at least 30 grass fires in recent months in the area of Yosemite Lakes Park.