Authorities fear five passengers, including Gold's Gym owner Rainer Schaller, and the pilot of a small plane were all killed when it crashed off Costa Rica's Caribbean coast on Friday.

Rescue teams have reportedly recovered the bodies of an adult and a child, but they have yet to be identified.

The Costa Rican Ministry of Public Security posted on Facebook that a small plane traveling from Mexico to Limon, Costa Rica, lost communications with the control tower at Juan Santamaría Airport around 6 p.m. while flying over the Parismina area of the Costa Rican Caribbean.

Esta noche las autoridades del Ministerio de Seguridad Pública recibieron información acerca de una aeronave ejecutiva proveniente de México rumbo a Limón, la cual perdió su rastro con torre de...

The Costa Rican Ministry of Public Security shares details of the plane crash on Facebook.

The plane was a nine-seat Italian-made Piaggio P180 Avanti, recognizable due to its distinct profile.

Costa Rica's Minister of Public Security Jorge Torres Carillo confirmed the crash on Twitter, also acknowledging continuing rescue efforts.

According to Martin Arias, the vice president of the Ministry of Public Security, the coast guard conducted rescue operations in the Caribbean Sea and wreckage of an aircraft was found 17 miles from Costa Rica's Limon Airport.

Schaller, a German entrepreneur, is the founder, CEO, and owner of the RSG group, a business conglomerate that includes the McFit, John Reed, and Gold's Gym fitness studios.

The German newspaper Bild reported that Schaller, along with his partner, their two children, and another unnamed man were passengers on the plane, citing a company spokesman.

Schaller was also the managing director of Lovapent, which organized the 2010 Love Parade techno music concert that ended with the death of 21 people and the injury of at least 500 crushed when panic broke out in a congested tunnel.