(KMOV) -- Officials say 11-year-old Katherine Campanella was killed in a three car wreck at around 4:20 pm Saturday afternoon on Interbelt 170, near Natural Bridge Road.
The Missouri Highway Patrol says the girl's 16 year old sister, Beth Campanella, was driving home on northbound 170 for her father's birthday party, with Katie in the passenger seat. Beth then lost control of her vehicle and crossed the median. She struck a cable barrier and spun out of control. Her Nissan Maxima then crashed into an oncoming SUV.
Katie was killed during the impact.
Beth Campanella remains in serious condition.
Family of Campanella gathered in Incarnate Word Acadamy in Normady for a prayer vigil Sunday evening to honor Campanella.
Incarnate Word Academy officials say counselors will be on duty Monday morning.
Police are still investigating to find out what caused the accident.