The studio behind the hit television series “House of Cards” has suspended Kevin Spacey while it investigates what it called “serious allegations” concerning the actor’s behavior on set.

The announcement by the studio, Media Rights Capital, came late Friday night and did not detail the nature of the allegations. It came shortly after Netflix said in a separate statement that it would not be involved with any further production of “House of Cards” if the show included its star, Mr. Spacey.

In its statement, Media Rights Capital said Mr. Spacey’s suspension was “effective immediately” and added that it would “continue to evaluate a creative path forward” for “House of Cards” during what it called a “hiatus.”

Production of the show’s sixth season had already been suspended earlier this week.

The announcements came after Variety reported earlier Friday that “House of Cards” producers were considering killing off Frank Underwood, the diabolical politician played by Mr. Spacey.