Man fatally stabbed attacker with his own knife during subway altercation; NYPD investigating.

A man was fatally stabbed with his own knife during an altercation at an NYC subway station. The incident began when the man stabbed a 24-year-old victim before being chased and overpowered. The injured victim then used the knife to fatally stab the attacker. The NYPD is investigating, and two people are being questioned in connection with the incident. The 24-year-old victim is expected to survive.