WACO, Texas (KWTX) A multiple-vehicle crash was backing up northbound traffic Monday on Interstate 35 through Waco.
All of the northbound lanes were blocked, authorities said.
The accident occurred just north of the U.S. Highway 84/Waco Drive exit, which remains open.
The Texas Department of Transportation estimated it could take as long as four hours to clear the accident scene.
The lanes were reopened by around 3:15 p.m.