Update, 2:45 p.m. Wednesday:
The object thought to be a "possible unexploded mortar round" turned out to be a "drive line," which is a vehicle part, according to Alaska State Troopers spokeswoman Megan Peters.
Alaska State Troopers were investigating a "possible unexploded mortar round" in Fairbanks that had closed down a main highway Tuesday afternoon, troopers said in a written statement.
Around 3:10 p.m., troopers got a report of the possible mortar near Mile 352 of the Richardson Highway, troopers said. The caller said he believed it was a 61-millimeter mortar round.
The highway was shut down and traffic was being diverted to Badger Road. It reopened around 5:30 p.m.
The Explosive Ordnance Disposal unit from Eielson Air Force Base was communicating with officers on scene, troopers said.
A Fairbanks Daily News-Miner reporter posted additional details on Twitter: