A crew member on the Los Angeles set of "The Lone Ranger," a new Johnny Depp movie, died on the morning of Sept. 21 after drowning and going into full cardiac arrest.

Law enforcement sources told TMZ the man was a diver. Allegedly, the crew member had been working under water in a tank before he went into cardiac arrest. 

Another crew member called 911 to report a medical emergency, but it was too late; when responders came onto the scene, the man was in full cardiac arrest.

He took a helicopter to a nearby hospital, but EMTs were unsuccessful in restarting his heart on the flight. According to TMZ, law enforcement sources said he was pronounced dead at the hospital.

So far, none of the movie producers have commented.  

According to the International Business Times, filming for the "Lone Ranger" began the first week of March. The film boasts a $215 million budget as well as A-Lister Armie Hammer, who plays the lead role, and Johnny Depp who stars as Tonto. 

The movie will be in theaters starting July 2013.