Trips with A kicker vs. river raise

[MastermindT]

Second round of a $11 SnG, no reads yet.

PokerStars No-Limit Hold'em Tourney, Big Blind is t30 (8 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

MP2 (t1350)
CO (t1520)
Button (t1190)
SB (t1750)
BB (t1900)
UTG (t2700)
Hero (t1640)
MP1 (t1450)

Preflop: Hero is UTG+1 with A[img]/images/graemlins/heart.gif[/img], J[img]/images/graemlins/club.gif[/img].
UTG calls t30, Hero calls t30, <font color="#666666">1 fold</font>, <font color="#CC3333">MP2 raises to t60</font>, <font color="#666666">3 folds</font>, BB calls t30, UTG calls t30, Hero calls t30.

Flop: (t255) J[img]/images/graemlins/heart.gif[/img], 2[img]/images/graemlins/spade.gif[/img], J[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(4 players)</font>
BB checks, UTG checks, Hero checks, <font color="#CC3333">MP2 bets t60</font>, BB calls t60, UTG folds, Hero calls t60.

Turn: (t435) Q[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(3 players)</font>
BB checks, Hero checks, MP2 checks.

River: (t435) 3[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(3 players)</font>
BB checks, <font color="#CC3333">Hero bets t285</font>, MP2 folds, <font color="#CC3333">BB raises to t600</font>, <font color="#CC3333">Hero ???