A crash was causing a traffic backup on southbound U.S. 23 north of Ann Arbor Monday morning.

The crash occurred about 7 a.m. near North Territorial Road, a dispatcher with the Washtenaw County Sheriff’s Office said. It was not blocking the freeway, she said, but a Google traffic map indicated a long backup in the southbound lanes.

It was not clear whether Michigan State Police had reached the scene, the dispatcher said about 7:20 a.m.

Further information was not immediately available.

View Crash 041513 in a larger map