Two helicopters 'collide' while filming TV show; cause is still unclear

Two helicopters carrying French sports stars filming a popular European reality show crashed in a remote part of Argentina killing 10 people, including two Olympic medal winners and a sailing champion, authorities said.

The helicopters apparently collided in midair on Monday near Villa Castelli in La Rioja province, about 1,170 kilometers northwest of Buenos Aires, La Rioja Secretary of Security Cesar Angulo told TN television. All 10 people on board - eight French nationals and two Argentine pilots - were killed.