ELKO, Nev. (AP) - Authorities arrested a 27-year-old Elko man after a high-speed chase and a bomb hoax that shut down Interstate 80 for several hours in northern Nevada.

Elko County Undersheriff Doug Gailey says Matthew Hellaby took off after he was pulled over Wednesday by a trooper east of Elko. With officers in pursuit, Gailey says Matthews phoned police dispatch and threatened to blow up ammonium nitrate in his trunk unless they backed off.

Gailey says after troopers spiked his tires near Wells, Hellaby turned around and drove at officers. One sheriff's deputy fired his gun at the approaching car but missed.

Gailey says Hellaby was eventually stopped and arrested after he dodged a road block and his flattened tires bogged down in soft dirt off the highway.

No explosives were found.