Birmingham, Alabama, leaders plead for information on mass shooting and announce reward money

Authorities have still made no arrests after Saturday's shooting killed four people and left 17 others injured. Police described it as a targeted "hit" on someone by multiple shooters who opened fire on a crowd waiting in line outside a nightspot in Birmingham's bustling Five Points South district.

Police believe that the shooters targeted at least one of the victims and that others were killed or injured in the barrage of gunfire, Chief Scott Thurmond said. Five of the injured victims remain in the hospital, he said. The FBI is offering a $50,000 reward, and Crime Stoppers is offering $50,000, officials said. Tipsters can remain anonymous.

The shooting — Birmingham's third quadruple homicide of the year — has put a spotlight on a city once best known for its role in the Civil Rights Movement but more recently plagued by gun violence.

Three of the nation's 31 mass killings this year occurred in Birmingham, according to a database maintained by The Associated Press and USA Today in partnership with Northeastern University. Birmingham, a city of about 200,000, has seen 114 homicides this year. Chicago, with more than 10 times the population, has seen a little over 400 homicides this year.

Saturday's shooting rocked an area of restaurants and bars that is often busy on weekend nights. It occurred on the sidewalk and street outside Hush Lounge as a long line of people waited to enter. Blood stains remained on the sidewalk until firefighters washed them away later Sunday.

Police identified the three victims found on the sidewalk as Anitra Holloman, 21, of the Birmingham suburb of Bessemer, Tahj Booker, 27, of Birmingham, and Carlos McCain, 27, of Birmingham. The fourth victim was identified Monday as Roderick Lynn Patterson Jr., 26.

Police said about 100 shell casings were recovered. In a statement late Sunday, police said the shooters are believed to have used "machine gun conversion devices" that make semiautomatic weapons fire more rapidly.

"We're looking at whether the switch was used in this particular case, or was this an assault rifle that was fully automatic or some other type of weapon," Thurmond said Monday.

The Birmingham mayor had urged state and federal officials to give cities more tools to address gun violence. He put both hands behind his back Monday to illustrate what it is like for cities to combat crime. Alabama last year abolished the requirement to get a permit to carry a concealed handgun in public.

"This mass shooting has a heavy toll of the community as a whole, but nothing more harmful than the emotional and physical pain of these actual victims," Woodfin said.