An arrest was made after a fatal crash in Siskiyou County very early Thursday morning. At 1:30AM a Toyota Prius driven by Irfan Sarwar was southbound on Interstate 5 near Montague at around 75 miles an hour. Temperatures were below freezing and the roadway was slick. A tractor-trailer was parked on the side of the onramp from Montague Road to Southbound I-5. The Toyota veered off the edge of the freeway and across the onramp, crashing into the side of the big rig. The passenger in the Toyota died at the scene. Sarwar suffered major injuries and was transported to Fairchild Medical Center. He was also arrested for felony driving under the influence of alcohol.