Emergency officials responded to an area near the Michigan City lighthouse pier at Washington Beach Park around 2 p.m. Monday after family reported the teen missing, according to the Indiana Department of Natural Resources.
Multiple agencies responded and began a search.
The teen's body was recovered by members of the Michigan City Fire Department about 50 minutes after arriving on the scene. Life-saving measures were attempted and the girl was transported to a nearby hospital where she was later pronounced dead, according to officials.
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A National Weather Service beach hazard statement reporting high-risk swimming conditions for the area was in effect at the time of the incident.
The death remains under investigation.