A crash is slowing traffic on US-23 north of Ann Arbor this morning.

The crash, involving at least two cars, is blocking the left lane of southbound US-23 at 6 Mile Road, a Washtenaw County sheriff's department dispatcher said at 7:30 this morning.

The crash occurred about 7:20 a.m., the dispatcher said. State police are on the scene. A Google traffic map showed a severe slowdown in the area.

No further information about accident was immediately available.

Traffic backups are shown in yellow, red and black on the map.