A vehicle fire restricted eastbound traffic Sunday evening on the Interstate 10 near Picacho Peak State Park. Just after 5 p.m., an RV caught fire in the right shoulder at milepost 214, located approximately 5 miles northwest of the state park. The right and center lanes were closed, restricting traffic to one lane. As of 6:15 p.m., all lanes re-opened but traffic was still delayed. No injuries were reported, and no other vehicles were involved. The cause of the fire is under investigation. Reach breaking news reporter Monica D. Spencer at monica.spencer@arizonarepublic.com or on Twitter @monicadspencer.