A 30-year-old woman was shot and killed by the father of her child early Sunday in Queens, police sources said.

Luz Cuza was shot in the head as she sat on her stoop near the corner of 147th Street and 133rd Avenue. in South Ozone Park just after 2 a.m.

Her boyfriend, Robert Rodriguez, 30, fled the scene after the shooting but was later captured by police. Charges against him are pending, officials said.

Ray Garcia, the victim’s brother, said he paid the couple a visit around 1 a.m. where he saw his sister outside and her boyfriend loading a gun in the doorway.

Garcia said Rodriguez was known to carry a firearm and often bragged about it, so he was not immediately alarmed by the sight of the weapon.

“I didn’t think nothing of it,” he said. “She didn’t say nothing. She was just sitting there. She had confidence that he wouldn’t hurt her — she’s his baby’s mother.”

Garcia said his the couple had been together for around 18 months and recently had a son.

“I looked at her and said, ‘What are you doing?’ She said, ‘I don’t think he’s gonna do nothing.’ So I went around house,'” Garcia said.

“Then I hear one shot.”

When he came back outside, Garcia said he found his sister on the ground bleeding from the head.

“I started crying. I told her, ‘I’m gonna save you, I’m gonna save you,’” he told his dying sister.

“She took a deep breath, but couldn’t talk. I started knocking on everybody’s door — boom boom boom — to get someone to call an ambulance.”

She was taken to Jamaica Hospital where she died, officials said.

Luz Cuza’s grieving mom Eugenia Arizemendi, 61, promised to care for her suddenly motherless grandson.

“I need to get this baby. That’s the only thing I’ve got now. I don’t got my daughter; I want the baby,” Arizemendi said.

“I wasn’t a strong woman in the hospital. I stood there until they zipped her up … the doctor explained to me that since she got to the hospital she was brain dead because the bullet went in her eye and out through her brain.”

David Cuza, another brother of the victim, vowed to be at suspect’s perp walk.

“I want to know when they’re going to transport him (Rodriguez),” said Cuza, 28. “I want to know if he’s got anything to say to the family. We just want to know why he did it. Why would you kill the mother of the child?”

The victim’s 17-year-old daughter Nyomi Duncan added: “He owes us an explanation.”

Ray Garcia speculated Rodriguez might have been drinking before he pulled the trigger.

“I guess it was alcohol,” Garcia said. “Every time he gets drunk he starts cursing, acting up. I told her he was dangerous. He was obsessed.”

Earlier in the night, two men were shot during a fight in Brooklyn, police said.

The unknown gunman opened fire shortly after midnight at the corner of St. Marks Avenue and Utica Avenue, striking a 34-year-old man in the left leg and a 36-year-old man in the back, knee and arm.

The younger man was taken to Interfaith Hospital for treatment while the older man fled the scene and was later located by police in Queens, who rushed him to Long Island Jewish Medical Center.

A third man who suffered head trauma and was initially believed to have been shot, but doctors later determined his injuries were the result of blunt force, officials said.

No arrests have been made and the investigation is ongoing, police said.