Six people were injured Monday when a motor-powered parachute crashed into a crowd at park in Hooper, Utah, according to FOX13Now.com.

Two sisters, ages 4 and 5, had to be flown by helicopter to a local hospital, according to Weber County Sheriff Lt. Lonnie Eskelson.

A man and his 17-year-old son were flying the powered paraglider at the Hooper Tomato Days festival to drop sponges that children could trade for prizes.

The parachute fell 50 feet to the ground. Witnesses said it was traveling about 30 mph when it struck the crowd.

Eskelson said the man and his son were not injured, but three adults and three girls on the ground were hospitalized with non-life threatening injuries.

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The Associated Press contributed to this report.