Detectives said a 17-year-old succumbed to his injuries at the Westchester Medical Center. Police are still looking for the suspect.
The shootings happened just after 3 p.m. Friday.
The first victim, who was shot several times, was found at 34 Monsey Blvd. The second man, who also suffered several gunshot wounds, was discovered at nearby 1 Fletcher Rd., according to investigators.
As the investigation continues, police are hoping the public can help with crucial information.
Anyone with information is asked to call Spring Valley Police at (845) 356-7400.