A drill rap war between rival Brooklyn housing projects may have been behind the senseless stray-bullet shooting death of a 7-month-old girl, law enforcement sources told The Post.

Accused gunman Amuri Greene was allegedly targeting the baby’s rapper father, Jamari Patterson, when he fired into a crowd in Williamsburg on April 1, killing little Kaori Patterson-Moore, the sources said.

Greene, 21, was allegedly part of a crew run out of the Marcy Houses feuding with a gang at the nearby Bushwick Houses, according to sources.

Patterson wasn’t affiliated with the rival crew, but his lyrics about the rap beef apparently irked Greene’s group enough that they allegedly sought to kill him, the sources said.

“Come outside, n—a, lace up your kicks,” Patterson, who goes by “MP,” raps in one track posted to his Soundcloud page.

“N—-a, I’m gonna wait for the max for the kill. I’m gonna empty your clip. Keep tracking you won’t make it home,” the lyrics say. “Three shots and it will leave a n—-a dead.”

Greene allegedly admitted that he was aiming for Patterson from the back of a moped, according to court papers — and sources now said it was over the inflammatory lyrics.

NYPD Chief of Detectives Joe Kenny said after the tragic shooting that Patterson had an “association” with some members of the Money Over Everything or “MOE” gang at the Bushwick Houses.

According to sources, Patterson’s rhymes got him caught in the middle of the ongoing drill rap feud between the Bushwick crew and the one from the Marcy Houses, which Greene was allegedly tied to, though the most recent song was uploaded to his account a year ago.

“We do know he has an association with some other MOE gang members,” Kenny said previously. “He is not in our criminal group database as an MOE gang member, but based on the geography and where he was at that time, we’re looking into that aspect.”

Greene is charged with murder and attempted murder in the shooting that also wounded Kaori’s 2-year-old brother.

His alleged accomplice, Matthew Rodriguez, was nabbed in Pennsylvania and was expected to be extradited to Brooklyn and to appear in court to face charges this week.

The Patterson-Moore family was out near Humboldt and Moore Streets when the shots rang out, with distraught mom Lianna Moore rushing her kids into a nearby bodega — when she looked down and saw the blood.

Heart-breaking surveillance video showed the mom screaming in panic when she saw her wounded baby, who had just started to say “mama,” according to her family.

The mom maintained last week that Patterson was not involved with a gang.

“That’s not what it was,” she told The Post. “Everybody keeps saying that they came out to target my fiancé, but he had nothing to do with it.”

The devastated dad has said he had been trying to turn his life around after his little girl was born.

“Upon graduating, I ended up having my beautiful baby girl, seeing her for the first time I knew she was special,” he wrote in a letter released after after a community vigil in the days following her tragic death.

When he finally got to take her home, he “made sure her and her mom and her brother all stayed with me and vowed I changed my life for them through music,” the letter said.

“The life I live, even getting different jobs to stay away from negativity, I begin to change things up. Which is facts.” 

The family held private services at the Lawrence H. Woodward Funeral Home on Troy Avenue Monday evening.

“Everybody’s sad from it,” family friend Tanya Moronta said through tears. “Right now, everybody have to just, you know, grow from it and watch each other’s kids.”

Moronta arrived with four pink children’s chairs covered with decorations like gems, flowers and bearing the baby’s name — calling them “Kaori’s heaven chairs.”

“I made them for the mother, the grandmother, the great grandmother and the other grandmother,” she said. “They’re just like a keepsake, just to keep. One of them has a light on it, where she could just put the light on it, she’ll see her shining.”

Reverend Al Sharpton also read a eulogy at the service, telling reporters he hopes the tragedy is a “wake-up call” for the community.

“Well, I said that we must turn this tragedy into a wake-up call in our own community by really starting again, patrolling and talking to our young people,” Sharpton told reporters following the service.

“We fight external forces, but we also need to have the internal infrastructure of bringing us out a matter of dignity and self-awareness that we don’t see this happen again.”

Sharpton added that he pledged to Kaori’s family that he would be with them “even beyond the camera.”

“And one of the community organizers that called and asked me, would I do the eulogy? Said, I know you’re busy, I know you’re famous. I said, No, I did not get famous to get removed. I got famous to put light in dark places. That’s why I’m here.”