Yeah it's probably the rumored SWAT themed BF game. I've found quite a lot of info...
EDIT1: The code-name is apparently Omaha.
EDIT2: Possible game modes: TDM, Turf War (Small and Large), Heist and Blood Mooney.
EDIT3: Possible teams: SWAT, Thieves, "LW" and "CR".
EDIT4: The game is pretty much ready for E3, Heist and Blood Mooney will be playable on the map High Tension (MP_Downtown).
EDIT5: I believe Commander mode will be available too.
EDIT6: Possible "classes" (maybe they're just loadouts): Enforcer, Mastermind, Techincian and Professional. There should be vehicles too.
EDIT7: Possible in-game store where you can buy weapons and accessories (hopefully ala CounterStrike).
EDIT8: There will be the police baton ("The police baton is used in melee combat to deter wrongdoes from bad behavior.")