MASON CITY, Iowa (KTTC) -- A preliminary federal report suggests that icy conditions will be among the factors checked by investigators trying to determine what caused the fatal crash of a medical helicopter in northern Iowa.
The report released Wednesday didn't include any conclusion about the crash cause.
The pilot and two others on board died the night of Jan. 2.
The helicopter had been headed to Emmetsburg, about 80 miles west of Mason City, to pick up a patient when it slammed into the ground just north of Ventura about 9 p.m.
The report said several witnesses mentioned icy conditions at the time.
Icy drizzle and fog were in the area.
The three victims were identified as nurse Shelly Lair-Langenbau, paramedic Russell Piehl and pilot Gene Grell.
A public memorial honoring the flight victims was held at North Iowa Area Community College on Jan. 10.
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