Ontario Provincial Police say one person is dead and two others were seriously injured in a collision that closed the 401 in both directions near Prescott.

Police say a tractor trailer and two other vehicles were involved, but wouldn’t provide other details.

Around 8:30 pm, the westbound lanes of the 401 re-opened to traffic. Overnight Sunday, the eastbound lanes also re-opened.

The investigation is ongoing.

The crash happened as many commuted home from the popular Brockville Tall Ships festival. The annual event attracts tens of thousands to the area.