Police say the workers were held up at the Shell station on Bartow Avenue just after 11:45 p.m.
One of them reportedly struggled with the armed suspect, who opened fire.
A 35-year-old attendant was shot three times in the leg, but one of the bullets punctured a major artery.
He was pronounced dead at Jacobi Medical Center.
The second attendant, a 37-year-old man, was shot in the left arm. He is in stable condition.
The suspect sped away in a white BMW without any money.
No arrests were immediately made.
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