One lane of westbound Interstate 10 is closed on Tucson's southeast side following a toxic substance spill on Thursday morning.

The Arizona Department of Public Safety said a minor-injury collision involving a tractor-trailer carrying hazardous materials caused the closure. Troopers and firefighters are on the scene.

On Thursday morning, both east- and westbound I-10 were closed but by 1 p.m., eastbound lanes at Wilmot Road were reopened. Just before 3:30 p.m., officials said the right westbound lane remained closed at Kolb Road but the left lane was reopened.

DPS is asking drivers to avoid the area.


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