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Production of the film was reportedly more than half completed before Saturday's death of Walker, the face and star of the franchise. Walker, 40, was killed in a car accident when the Porsche he was passenger in crashed and caught fire.
The Wrap added that yesterday's scheduled shoot in Atlanta was canceled as studio executives for Universal Pictures try and cope with losing its main actor and to give the rest of the cast, including Vin Diesel, a chance to grieve.
A rep for Universal would not comment to ABC News about production of "Fast 7."
The film was scheduled for release next summer. It has not yet been determined if this date will be pushed back.
THR reported that the film's director James Wan held a conference call Sunday with executives to discuss the state of the film and if rewrites are necessary.
Shooting was scheduled to take place this week in Atlanta and Abu Dhabi later in the month. After Monday's cancellation, reps for Universal couldn't confirm information about if and when production would resume.
Before his death, Walker was set to reprise his role as Brian O'Connor, undercover cop and federal agent turned wanted criminal. This would be Walker's sixth "Fast & Furious" film - he was absent from the "Tokyo Drift" spinoff movie.
The studio did release a statement after the accident Saturday night: "All of us at Universal are heartbroken. Paul was truly one of the most beloved and respected members of our studio family for 14 years."