By . Helen Pow . PUBLISHED: . 15:23 EST, 19 August 2013 . | . UPDATED: . 17:00 EST, 19 August 2013 . Two cheerleader sisters and their friend who was days away from going off to college have been killed in a tragic car crash. Kathleen Oliver, 17, and Lauren Oliver, 18 were traveling with Christopher Lenzen in the 18-year-old's open-topped sports car when it crashed on Homestead Manor Drive in the St Louis suburb of Wildwood at 9:40 p.m. on Thursday. Another friend, Olivia Dames, 18, survived the accident. It's not yet known whether alcohol played a part in the crash. Sisters: Kathleen Oliver, 17, left, and Lauren Oliver, 18, right, are dead after the horror crash . Investigators are still trying to determine what caused the deadly crash, which involved no other vehicles. Police said Lenzen drove his 2013 Infiniti G37S convertible off the road and into the side of a house. The car came to a stop in a wooded area behind the home. The two sisters were pronounced dead on the scene, police said, and Lenzen, who was close family friends with actor John Goodman, died a short while later in hospital. 'Our hearts are breaking for the families of these young people,' Kim Cranston, chief communications officer with the Rockwood School District, told The River Front Times. Driver: Christopher Lenzen, left, also died in the crash but a fourth passenger, Olivia Dames, survived . Best friends: The sisters, Kathleen, left, and Lauren, center, were best friends with Olivia Dames, right . 'Today, many people in the Rockwood School District are grieving. These were outstanding young women and a young man, and we are so sorry for the loss of their lives.' Lauren had graduated Eureka High School last school year, while her sister Kathleen was a senior at the school. Lenzen was a graduate of Marquette High School. Dames, who had attended Eureka with Lauren, took to Twitter to mourn her friends after the terrible crash. 'Lucky to be here to spread the joy and love of the three most important people to me,' she said in her first tweet after the accident. Angels: Dames tweeted on Friday that the sisters were holding each other when they died . Survivor: Dames mourned for her friends on Twitter after the crash . 'I love my beautiful angels they truly saved my life.' She also changed her Twitter bio to 'my three beautiful angels how I love you so.' In another tweet, she wrote: 'Lauren & Katherine became angels while holding each other tight. A sight no one can take away from me but something to celebrate.' Lenzen was this week due to head to the University of Missouri at Columbia where he planned to studying business. He was an 'outstanding athlete' who played varsity basketball for four years and varsity baseball for three years, according to Cranston. John Goodman attended a bonfire for Lenzen on August 16. 'He's a close family friend,' KSDK reporter Farrah Fazal tweeted. Why? Investigators are still trying to determine what caused Lezen, left, to crash the sports car, killing Lauren Oliver, right, and her sister as well as himself . Friends: Lezen's family were close friends with actor John Goodman and the actor attended a bonfire for the three dead teens, pictured . Cranston said the Oliver sisters were . also very involved in their school, and took part in cheerleading, cross . country and show choir. Dames also retweeted one of Lensen's poiniant final tweets. '"So hard saying goodbye to someone, not being sure if you will ever see them again..." You're my stars, I love you,' she wrote. On . August 11, Lenzen also tweeted: 'No matter who you lose this week, stay . strong. Because I can guarantee they will not forget you #‎friendsstayforever. This message was written in a makeshift . memorial for the three as their town mourned the heavy loss. A service was held for the three teens on Monday.
Kathleen Oliver, 17, and Lauren Oliver, 18, were traveling in Christopher Lenzen's sports car when he crashed into a house in St Louis .
Another friend, Olivia Dames, 18, survived the accident, which happened at 9:40 p.m. on Thursday .
Lenzen, 18, was a close family friend of John Goodman and the actor attended a bonfire in the teen's honor on Friday night .
By . Helen Pow . PUBLISHED: . 15:23 EST, 19 August 2013 . | . UPDATED: . 17:00 EST, 19 August 2013 . Two cheerleader sisters and their friend who was days away from going off to college have been killed in a tragic car crash. Kathleen Oliver, 17, and Lauren Oliver, 18 were traveling with Christopher Lenzen in the 18-year-old's open-topped sports car when it crashed on Homestead Manor Drive in the St Louis suburb of Wildwood at 9:40 p.m. on Thursday. Another friend, Olivia Dames, 18, survived the accident. It's not yet known whether alcohol played a part in the crash. Sisters: Kathleen Oliver, 17, left, and Lauren Oliver, 18, right, are dead after the horror crash . Investigators are still trying to determine what caused the deadly crash, which involved no other vehicles. Police said Lenzen drove his 2013 Infiniti G37S convertible off the road and into the side of a house. The car came to a stop in a wooded area behind the home. The two sisters were pronounced dead on the scene, police said, and Lenzen, who was close family friends with actor John Goodman, died a short while later in hospital. 'Our hearts are breaking for the families of these young people,' Kim Cranston, chief communications officer with the Rockwood School District, told The River Front Times. Driver: Christopher Lenzen, left, also died in the crash but a fourth passenger, Olivia Dames, survived . Best friends: The sisters, Kathleen, left, and Lauren, center, were best friends with Olivia Dames, right . 'Today, many people in the Rockwood School District are grieving. These were outstanding young women and a young man, and we are so sorry for the loss of their lives.' Lauren had graduated Eureka High School last school year, while her sister Kathleen was a senior at the school. Lenzen was a graduate of Marquette High School. Dames, who had attended Eureka with Lauren, took to Twitter to mourn her friends after the terrible crash. 'Lucky to be here to spread the joy and love of the three most important people to me,' she said in her first tweet after the accident. Angels: Dames tweeted on Friday that the sisters were holding each other when they died . Survivor: Dames mourned for her friends on Twitter after the crash . 'I love my beautiful angels they truly saved my life.' She also changed her Twitter bio to 'my three beautiful angels how I love you so.' In another tweet, she wrote: 'Lauren & Katherine became angels while holding each other tight. A sight no one can take away from me but something to celebrate.' Lenzen was this week due to head to the University of Missouri at Columbia where he planned to studying business. He was an 'outstanding athlete' who played varsity basketball for four years and varsity baseball for three years, according to Cranston. John Goodman attended a bonfire for Lenzen on August 16. 'He's a close family friend,' KSDK reporter Farrah Fazal tweeted. Why? Investigators are still trying to determine what caused Lezen, left, to crash the sports car, killing Lauren Oliver, right, and her sister as well as himself . Friends: Lezen's family were close friends with actor John Goodman and the actor attended a bonfire for the three dead teens, pictured . Cranston said the Oliver sisters were . also very involved in their school, and took part in cheerleading, cross . country and show choir. Dames also retweeted one of Lensen's poiniant final tweets. '"So hard saying goodbye to someone, not being sure if you will ever see them again..." You're my stars, I love you,' she wrote. On . August 11, Lenzen also tweeted: 'No matter who you lose this week, stay . strong. Because I can guarantee they will not forget you #‎friendsstayforever. This message was written in a makeshift . memorial for the three as their town mourned the heavy loss. A service was held for the three teens on Monday.
17, and Lauren Oliver, 18 were traveling with open-topped sports car when it crashed on Wildwood at 9:40 p.m. on Thursday. Another friend, Olivia Dames, 18, survived the accident. in the crash. Sisters: Kathleen Oliver, 17, left, Lenzen on August 16. 'He's a close family close friends with actor John Goodman and the actor attended a bonfire for the three dead