MERRILLVILLE, Ind. (AP) — A northwestern Indiana child care center has honored the lives of two girls who were among seven relatives killed in a fiery crash along Interstate 65.

Children attending Happy Days Child Care Center in Merrillville released yellow balloons Friday in remembrance of 5-year-old Yazmin Goldman, her 3-year-old sister Arielle Goldman and their 27-year-old mother, Lindsey Williams.

The Times of Munster reports that the child care center's director read a poem about friends before the balloons were released.

The Goldman siblings had once attended the child care center. They died Aug. 15 along with their mother and four relatives when their vehicle was rear-ended by a semitrailer and forced into the back of another semi in a construction zone.

A funeral service was held Thursday for the victims.