PUEBLO, Colo. (AP) — Four people died in crashes involving over 30 vehicles, including six semitrailers, on an interstate in Colorado Tuesday after blowing dirt made it nearly impossible to see, authorities said.

The Epic Aircraft E1000 crashed near Emerald Mountain in the Steamboat Springs area of Colorado shortly after midnight Feb. 13. The victims were identified Feb. 14 as Aaron Stokes, 47, his son Jakson Stokes, 21, his nephew Colin Stokes, 21, and Austin Huskey, 38.