Authorities have renewed their appeal for public help in solving the killing of a 15-year-old girl, who was gunned down as she waited with her mother outside a hamburger stand in South Los Angeles.

Hannah Bell was shot about 9 p.m. on April 27 at the Best Burger hamburger stand near 77th Street and Western Avenue and died at a hospital, the Los Angeles Police Department reported.

Police and the girl’s family members hosted a news conference late last week to seek public help in solving the crime.

The girl’s mother attended an April 30 news conference where a $50,000 reward was announced for information that helps solve the crime.

“It was wrong to take my daughter,’’ Samantha Mays said at the time. “She was innocent.’’

Police had described the suspect only as a male wearing a black hoodie, who fled the crime scene on foot. Anyone with information on the case was urged to call (877) LAPD-247.