CORRECTED-UPDATE 7-French sports stars killed in Argentina helicopter crash
(Corrects time of accident in paragraph three)
* Ten killed as helicopters collide
* "French sport in mourning", says minister
* Second tragedy in 2 years for a TF1 reality show
By Jorge Otaola and Mark John
BUENOS AIRES/PARIS, March 10 (Reuters) - Three French sports stars -- Olympic swimmer Camille Muffat, yachtswoman Florence Arthaud and boxer Alexis Vastine -- were among 10 people killed when two helicopters collided in Argentina on Monday during the filming of a reality TV show.
Authorities said it was still unclear what caused the accident in the rugged western province of La Rioja near the Andes mountains.
French media citing Argentinian sources said the helicopters were flying through clear skies at an altitude of about 100 metres when they hit each other around 5.15 p.m. local time (2015 GMT).
Amateur footage showed dozens of people rushing through heavy undergrowth toward the helicopters' burning wreckage. Continuación...