On Monday, authorities have identified the four people killed during a shooting at a teenager's birthday party on Saturday in the U.S. state of Alabama, though many details of the incident still remain opaque.

The four victims were all between 17 and 23, said Tallapoosa County Coroner Mike Knox.

One of the four people killed during the violence was a high school football player who was among those attending his sister's "Sweet 16" birthday celebration when a gunman opened fire.

Thirty-two others were injured, the Alabama Law Enforcement Agency said, an increase from the previous reported number of 28 on Sunday.

The party was being held inside the Mahogany Masterpiece Dance Studio, converted from an old bank building located about half a block from city hall in Dadeville, a town of about 3,000 residents.

The Alabama Law Enforcement Agency has said only that shell casings from handguns had been found, noting that there was no evidence a high-powered rifle was used. Investigators continued to appeal for information from the public, including videos.

CGTN stringer interviewed several local residents. They shared their experiences of Saturday night when the mass shooting broke out. One said he arrived there after the shooting and saw many teenagers with gunshot wounds.

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The weekend was marked by a series of high-profile shootings in the United States. One left two people dead and four wounded on Saturday in Louisville, Kentucky; another resulted in four men being shot, one fatally, in Los Angeles; and a third left two women wounded at Lincoln University in southeastern Pennsylvania.

Mass shootings have become commonplace in the United States, which has experienced 163 mass shootings in the country so far this year, including 16 incidents in the week from April 10 to 16, according to the Washington, D.C.-based nonprofit Gun Violence Archive.

The year 2023 witnessed the most mass shootings and mass shooting deaths at this time in the year in at least a decade, it said.

(With input from agencies)

(Cover: Investigators search the crime scene following a shooting in Dadeville, Alabama, U.S., April 16, 2023. /CFP)