The person, or people, who carried out the Alabama mass shooting at the weekend may have been paid to kill, police said. Multiple rounds of shots were fired in the popular Five Points South neighborhood in Birmingham,

A search is underway for the shooters who killed four people and injured 17 others in a popular nightlife area in Birmingham, Alabama.

Birmingham police are teaming up with the sheriff's office, the FBI, and other agencies to bring the shooter or shooters to justice. Investigators are considering a wide range of motives in the case. Chief Scott Thurmond believes the person being targeted was one of the four killed.

A $100,000 reward is still on the table for anyone who offers information that leads to the suspects of a shooting in Birmingham, Alabama, where four were killed and more than a dozen were injured. The suspects apparently targeted at least one person in the area.

Gunmen shot into a group of people in a popular entertainment district in what appeared to be a targeted attack, the police said. The authorities are still looking for the shooters.

Law enforcement officials were working to track down the shooters who killed four and injured 17 others in a popular area for nightlife.

The shooting, which left four dead and 17 injured, is just the latest spurt of mass violence made possible by the small 3D-printed part known as a “conversion device,” “Glock switch” or “auto sear.”

Birmingham authorities have still made no arrests after Saturday’s shooting killed four people and left 17 others injured.