Northbound Interstate-17 was closed for a short time Tuesday after a two-vehicle accident near Camp Verde. DPS officials say the accident happened at milepost 284 at around 1:13 p.m. when a FedEx tractor trailer rolled off the roadway and its two trailers were blocking the northbound lanes. The lanes were closed for about an hour before one lane was reopened. Traffic was backed up for some time as the wreck was cleared. No injuries were reported in the accident.