One person was killed and another was seriously injured in a crash near Seattle-Tacoma International Airport Sunday morning. Puget Sound Fire (PSF) first tweeted about the deadly crash on the 17300 block of International Boulevard just after 11:15 a.m. Sunday. PSF said one person was killed in the crash and another person “sustained serious injuries.” The person who was seriously injured was taken to a Seattle area hospital by King County Medic One, according to officials. PSF said both directions of International Boulevard were closed to traffic during the investigation. What led up to the deadly crash is currently unknown.