Rainer Schaller was reportedly on the flight (Photo: Getty)

Six people, as reported, including a German millionaireare feared dead after a luxury jet crashed into the Caribbean Sea near Costa Rica.

Pieces of a twin-engine turboprop plane were found in the water in Limon today after the flight went missing last night, authorities said.

The flight plan filed for the small charter plane listed Rainer Schaller, owner of the popular German fitness studio McFit, as a passenger.

Amid extensive searches along the Limon coast, a source told the national news channel Noticias Telediario that a child’s body was found at the scene of the accident.

A “teddy bear and coloring book” were also found, authorities confirmed to the broadcaster in a separate report.

Earlier today, Assistant Secretary of State for Security Martin Arias said: “Fragments have been found that indicate this is an aircraft.

“Until now, we have not found any dead or alive bodies.”

Mr Schaller, 53, was reportedly traveling with a 44-year-old German woman, a 40-year-old man and two minors, as well as a 66-year-old Swiss pilot, the Ministry of Public Security said.

German newspaper Bild informs that Mr. Shaler’s partner Christian Shikorski and their two children were on the plane.

The luxury Italian-made 9-seater Piaggio P180 Avanti disappeared two and a half hours after leaving Palenque in Chiapas, Mexico, en route to Limon.

The plane disappeared from radar near Barro de Parismin, just 25 miles from the resort town of Limon, while flying at an altitude of 2,500 feet.

The wreckage was found about 17 miles from Limon International Airport.

Security Minister Jorde Torres said: “At around six o’clock in the afternoon, we received a signal about a flight coming from Mexico to Limon airport with five German passengers on board.”

The search was suspended for the night because of concerns about bad weather, Mr. Torres added.

Mr. Schaller is the founder and CEO of the global fitness brand RSG Group.

Metro.co.uk has contacted RSG Group for comment.

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Two children among six tourists feared dead after plane crashes off Costa Rica