( CNN ) -- Police in Buffalo , New York said Saturday evening that they have arrested and charged a suspect in connection with a shooting spree that left four dead outside a downtown restaurant earlier in the day . The Buffalo Police Department said 25-year old Keith Johnson is in custody and has been charged with four counts of second degree murder . Authorities would not comment on whether Johnson knew his alleged victims . Eight people hit by bullets in the early morning rampage , police say . One of the four survivors is in critical condition . At a news conference Saturday , Police Commissioner Daniel Derenda said that the dead -- two men and two women -- included a Texas man who was celebrating his wedding anniversary . About 100 people were at the City Grill when the shootings occurred , and patrons were asked to leave the restaurant 's bar after some sort of argument , police said . City Grill posted a message on its website on Saturday , saying that it is `` cooperating fully with the authorities and the ongoing investigation . '' It added , `` Our thoughts and prayers are with the victims and their families . '' CNN 's Rick Martin and Alona Rivord contributed to this report .
NEW : A 25-year old suspect is under arrest in connection with the shooting spree . NEW : Keith Johnson has been charged with four counts of second degree murder . Eight people were shot , four fatally , at the City Grill restaurant . Four others were injured and one is in critical condition .