A small plane crashed into a swamp in northern Wisconsin, killing three people on board. The twin-engine Rockwell International 690B went down about 12 miles (19 kilometers) east of Eagle River, the Federal Aviation Administration (FAA) said. Local law enforcement officials were yet to comment on the deaths following Tuesday morning’s crash. Quoting flight-tracking company FlightAware, Associated Press reports that the plane is registered to a Chesterfield, Missouri-based mapping and data services provider.

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Rhinelander/Oneida County Airport Director Matthew Leitner said Wednesday the plane departed about 8:45 am Tuesday. Leitner said he received a communication from air traffic control in Minneapolis 45 minutes later that a plane was missing.

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National Transportation Safety Board (NTSB) is sending an investigator to examine the aircraft, request any air-traffic communications, radar data and weather reports. The investigator will also try to contact any witnesses and request maintenance records, and medical records and flight history of the pilot, said NTSB spokesman Keith Holloway.

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Meanwhile, in California, rescuers searched the water near Carlsbad after reports of a plane crash off the coast around 11 am on Wednesday. The US Coast Guard pressed a helicopter into service, but couldn’t spot the plane. According to Fox News, a county spokesperson said the FAA could not confirm the crash.

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Carlsbad Fire Department said they were investigating whether the emergency calls were prompted by a pilot who had since landed safely at a nearby airport and confirmed he was doing stunts in the area around the time of the reports.

Chief Kevin Lynds told FOX 5. “We can’t confirm if that is the plane that people saw, but we do have a report of a pilot that was in the area, doing those maneuvers.”