Citing people involved in the negotiations, the New York Times reported on its Web site on Monday that a consortium of private equity firms could acquire Saber for more than $4 billion.

A Saber spokesman did not return calls seeking comment.

Two investor groups are vying for Saber and a third is considering a bid, the paper said. A deal to acquire Saber could be struck as early as Tuesday.

A successful bid would mean that two of the top four online travel agencies would be private.

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