A 19-year-old woman and a 13-year-old boy were shot during an altercation in San Pedro late Tuesday, police said.

The incident unfolded around 11:55 p.m. near the intersection of Mesa and West 1st streets, Los Angeles Police Department Lt. Letisia Ruiz said.

Police said the woman and another female were involved in an argument related to a romantic relationship before shots rang out.

The two victims were wounded and taken to a hospital. Their conditions are unclear.

Police detained a female, but she was eventually released.

The suspected shooter remains at large. She is described as a 14-year-old girl who was last seen running on Pacific Avenue, police said.

A witness told KTLA she heard “a lot of screaming, a lot of shouting, talking about ‘come out, do something'” before a shot was fired.

“It was madness,” she said, adding that a woman tried to stop one victim’s bleeding while neighbors rushed to the scene and called 911.

Video from the scene showed officers scouring the area for a suspect and placing evidence markers on the ground.