ISP says 2 killed in crash during police chase September 7, 2017 Associated Press Mason City, Iowa (AP) – Authorities say a police chase has led to a crash near downtown Mason City that killed two people. Officials report the crash happened just before 1 p.m. Thursday. The Iowa State Patrol says the incident began as a traffic stop that led to the short chase. Patrol Sgt. Dana Knutson says the vehicle lost control, hit a tree and rolled, killing both occupants. The names of those killed and other details have not yet been released.