Johnny Depp and Armie Hammer Johnny Depp and Armie Hammer

A member of the crew on the new Lone Ranger film died Friday, the Associated Press reports.

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The 48-year-old man, whose identity has not yet been released, drowned after suffering cardiac arrest while cleaning a pool that was going to be used in the film. Authorities are now investigation the incident, which Coroner's spokesman Ed Winter says can likely be attributed to a heart attack.

The upcoming film, starring Johnny Depp as Tonto and Armie Hammer as the titular Lone Ranger , is expected to premiere in July 2013.