The team says it is not commenting further until they have more information.
Ottawa police say they can't comment on the media reports because no charges have been laid.
When asked if Giroux was still in custody, a police spokesman said he "is no longer here."
Police say they don't expect charges to be laid.
The Ottawa Police said in a separate press release that seven arrests were made in connection to Canada Day festivities and that all but one were for "non-criminal matters."
Pat Brisson, Giroux's agent, did not immediately respond to an email seeking comment.
Giroux, a native of Hearst, Ont., who lives in the Ottawa area, was a finalist for the Hart Trophy as NHL MVP this past season.
The 26-year-old had 28 goals and 58 assists in leading the Flyers to the playoffs.
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