The NFL has placed a temporary ban on all flame effects and pyrotechnics used on its playing fields as it investigates a fire at the Tennessee Titans’ Nissan Stadium in Week 2.

The league confirmed the moratorium in a statement Friday morning, saying it will remain in place at least until its review of the incident is completed.

According to a separate statement from the Minnesota Vikings, teams can still use pyrotechnics away from the field, such as those released along the roof of U.S. Bank Stadium.

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