A 20-year-old man was killed and three others were wounded during a shooting Wednesday night inside the lobby of a Bedford-Stuyvesant apartment.

Investigators say the victims had just left a party at 1778 Fulton St. and were waiting for a cab in the lobby when somebody came up to them and opened fire.

The slain 20-year-old man was identified as Giovanni Lewis. The other victims included another 20-year-old man and two women. They are expected to survive.

A motive for the shooting is still unclear.

Police are asking anyone with information about the shooting to call Crime Stoppers at 1-800-577-TIPS.