LOVELAND, Colo. (CBS4)- A semi that rolled over on Interstate 25 Wednesday afternoon closed some lanes north of Loveland for nearly four hours.

Colorado State Troopers were notified about the crash in the southbound lanes of I-25 north of US 34 at Exit 259 Crossroads Blvd. at about 3:05 p.m.

A semi truck hauling scrap metal rolled over and spilled its load of scrap metal across the southbound lanes. All southbound lanes of I-25 reopened at 6:50 p.m. Traffic was re-routed off I-25.

The cause of the rollover is being investigated.