MONROE — An overturned tractor-trailer rig backed up traffic on northbound I-75 near Monroe early today, authorities said.

There were no injuries, according to Michigan state police.

The crash on the highway occurred occurred about 6:25 a.m. near Nadeau Road, a police dispatcher said.

The incident remains under investigation.

First Published July 5, 2016, 2:04 p.m.