A 64-year-old Rock Island man was in critical condition Monday at Central Washington Hospital Monday after a tractor accident Friday afternoon.  The Wenatchee World reported 64 year old Robert Gemkow was injured in the 1300 block of Douglas Street in Rock Island.  Douglas County Sheriff Harvey Gjesdal said witnesses reported Gemkow's leg was pinned under the tractor's rear tire shortly after 5pm.  A Sheriff's  Deputy arrived and performed CPR until the injured man could be transported to the hospital. Gjesdal said there were no witnesses to the accident and it is unclear how Gemkow was injured

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