2 teen girls die after their jet ski crashes into boat at Illinois lake

Two teen girls met a tragic end after a jet ski joyride on a local Illinois lake turned deadly, it was reported .

Sarina Vootkur, 16, and 13-year-old Elle Kim were racing along on a jet ski on Lake Marie on Tuesday, allegedly traveling at an incredibly "high rate of speed" when they crashed into a boat.

They had been approaching the Gass Lake Channel, the Lake County Sheriff's Office revealed in a Facebook update on the incident, and found themselves unable to avoid hitting a boat operated by a 55-year-old man. Both were knocked unconscious and thrown into the water.

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Despite wearing life vests, the girls didn't stand a chance after being thrown in at such high velocities. There had been four people on the boat, and they helped pull the teens out of the water.

They rendered aid to the best of their abilities as they called 911. One of the girls was taken back to the shore by the boat's operator, while a passing vessel took the other girl.

Their heroic efforts were ultimately unsuccessful, however. Both girls were rushed to a nearby hospital in Libertyville but pronounced dead upon arrival. They were the only injuries related to the deadly crash.

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In an autopsy shortly after their deaths, the Lake County Coroner's Office reported that they had died from serious blunt force injuries incurred by the collision, Gray News reported.

An investigation into the crash is underway by the Lake County Sheriff's Office as well as the Illinois Conservation Police. "The Lake County Sheriff's Office extends its condolences to the families of the girls and others involved in this tragic boat crash," the sheriff's office wrote.

Vootkur and Kim, of Lake Forest, California, and Long Grove, Illinois, respectively, were reportedly out jetskiing at around 5:15 p.m. on Tuesday when the fatal collision occurred. They had been riding a Yahaha jet ski, and Vootkur had been driving.

Lake Marie, where the incident occurred, is located in Antioch Township, which is in Lake County about 60 miles north of Chicago along the Michigan border.