Rockstar San Diego is collaborating with Rockstar North on Grand Theft Auto V, a LinkedIn CV of an ex-employee has said.
The profile of Jonathan G mentioned he had worked on "Grand Theft Auto 5 at Rockstar San Diego" alongside other recent work at Insomniac Games on Resistance 3.
RSD had last worked on Red Dead Redemption. It's also the creators of the Midnight Club series.
Rockstar North has been the only confirmed developer to date on the game, having done all the main installments in the series so far.
The company has collaborated on past projects before, though, Most recently is Max Payne 3, which was handled at Rockstar Vancouver, but was advertised as a Rockstar Studios production.
GTA V still has no date or platforms. Don't expect E3 to give any answers next week neither.