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GEORGETOWN -- Two siblings drowned at Lake Georgetown Sunday evening after they were playing in the water 15 feet away from the shore, authorities said.

Williamson County EMS responded to Russell Park at Lake Georgetown around 5 p.m. Witnesses performed CPR on the children until medics arrived.

The 4-year-old girl was underwater for about five minutes and the 6-year-old boy was underwater for 15 minutes. Both children were found in two to three feet of water.

Medics transported the victims by helicopter to Dell Children's Medical Center with CPR still in progress.

Family members were reportedly at Lake Georgetown when the incident occurred.

Georgetown police said the investigation is ongoing.

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