Officers responded to reports of shots fired in Ditmas Park at about 3:30 a.m. Sunday.
Upon arrival, they found two people with gunshot wounds.
The younger victim, 22-year-old Floyd Anderson, was shot in the chest. The second victim, a 23-year-old male, was shot in the abdomen.
Anderson was declared dead at Kings County Hospital.
The 23-year-old man is in critical condition.
Police are trying to determine whether they shot each other, or if another person was involved.