(WCJB/Gray News) - Authorities in Florida are searching for a gunman who opened fire on a mother and her two children as they drove on Interstate 10.

Baker County sheriff's deputies said the family left Macclenny and entered the interstate headed east toward Jacksonville around 11 p.m. Sunday, when someone in another vehicle shot at them.

A 6-year-old child was shot in the arm, and an 11-year-old was hurt by bullet fragments.