LAWRENCEVILLE, Ga. (AP) - A deadly crash involving a pedestrian has led authorities to close all southbound lanes of Interstate 85 in Gwinnett County, Georgia.

News outlets report the Thursday morning crash and shutdown caused about seven miles of bumper-to-bumper traffic between Suwanee and Lawrenceville. Details about the crash and the pedestrian weren't immediately clear.

Gwinnett County police tweeted that the highway's HOV lane was open during the shutdown. The county's transit system tweeted that all its express routes would be delayed.

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