Sony has cast doubt over the PS3 exclusivity of long-in-development Rockstar title Agent.

Asked by GameTrailers TV if the title's still going to be a PS3 exclusive, Sony Computer Entertainment CEO Jack Tretton said: "I don't know where we're going to end up on that."

He did confirm the game's "still in development", but added when asked why we haven't seen it for so long: "You'd have to ask Take-Two about that."

Tretton's comments come shortly after publisher Take-Two appeared to confirm that Agent is still very much a PS3 exclusive.

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