It is pre-flop, SB 1,000, BB 2,000, and BBA 2,000.
Everyone folds around to the SB, who calls the 2,000. The BB, with his last 3,000 in his hand, announces "raise 3" and then puts the 3,000 on top of the previous 2,000 BB.
The dealer says: "That's going to be a min-raise to 4,000." The BB say: "I raised all-in."
How do you rule?