Police say a truck driver attacked another driver at a truck stop in Sioux Falls on Friday after the other driver blocked the gas pump.

Nikolai Gennadyevich Stepennov, a 51-year-old man from Albert Lea, Minnesota, was charged with aggravated assault.

Police spokesman Sam Clemens said Stepennov became angry at another truck driver at a truck stop when the other driver was using washer fluid to wash his truck at the pump instead of taking it to the wash bay, blocking the pump.

After the two exchanged words, Stepennov allegedly got a hammer from his truck and swung it at the other driver, a 52-year-old man from Blair, Nebraska. The man was not injured, but Stepennov was arrested by police as he left the truck stop.

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