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KNOXVILLE, Tenn. (WATE) – Authorities say one person has died after a helicopter crashed into the Tennessee River.

A Knoxville Fire Department spokesman says three others escaped the wreckage late Monday and were rescued by a pontoon boat on the river. They refused medical treatment.

The agency said nearby residents called authorities after the crash happened around 7:40 p.m., and the fire department sent crews into the water to search for the fourth victim.

A Federal Aviation Administration spokeswoman said the victim’s body was recovered around 9:45 p.m.

None of the people onboard have been identified.

The National Transportation Safety Board is determining the cause of the crash.  

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