A friend and business collaborator of acclaimed singer Solange Knowles remained hospitalized Friday in New Orleans, two days after she was stabbed 10 times in the St. Roch area by a woman who claimed she was acting in self-defense, according to police.

Armina Mussa, 24, underwent multiple surgeries after the attack, which police said happened about 6:45 p.m. Wednesday in the 2200 block of North Derbigny Street.

Mussa, who works with Knowles on the performer’s Saint Heron creative brand and website, received an array of injuries, including at least one wound to the neck. Authorities described her cuts as “potentially fatal,” according to court documents.

Knowles is the sister of musical superstar Beyoncé.

The knife-wielding woman, Aaronesia Christophe, 26, admitted to the stabbing but told police she acted in self-defense after Mussa began punching her, authorities said.

Christophe was booked on aggravated battery, a count that was upgraded to attempted second-degree murder after the authorities realized the severity of Mussa’s injuries. She remained jailed Friday in lieu of $50,000 bail.

Christophe, who according to court records lives in New Orleans East, told police she had gone to North Derbigny Street to visit Emmit Charles, a friend from high school. Court records described Mussa, who lives at a neighboring residence, as Charles’ ex-girlfriend.

Arriving officers found Christophe standing in a parking lot near the residence, on the phone with police dispatchers. She had a small cut on one of her fingers and quickly admitted to stabbing Mussa, who she claimed punched her and pulled her hair, according to a police report.

Christophe told police that when she got out of her vehicle at Charles’ residence, Mussa came outside “and started yelling at her to leave,” the police report says.

“We’re just friends. Why do I have to leave?” Christophe said in response, according to the report.

Christophe said she got back into her vehicle and grabbed a small folding knife. She told police she warned Mussa to “get back” but that Mussa continued to berate her.

Holding the knife in her right hand, Christophe said, she then got out of the vehicle and told Mussa to “please back away,” the report says.

At that point, Christophe claimed, Mussa began punching her and grabbing her hair, pulling her toward the ground. Christophe told police she began swinging the knife at that point, “unable to see if she made contact with the victim.”

She told police Mussa began punching her harder, adding that “she did not think she had stabbed the victim due to the harder thrown punches.” But she also acknowledged Mussa told her at one point she had been stabbed, the report says.

In addition to working with Knowles through Saint Heron, Mussa also co-founded the French Quarter boutique Exodus Goods with the singer and sisters Darlene and Lizzy Okpo.

Sarah Cunningham, a representative for Knowles at Columbia Records, said the singer responded swiftly upon hearing of the stabbing.

“Upon hearing of Armina’s hospitalization, she immediately left Los Angeles and went down to New Orleans,” Cunningham said, “and has been with Armina and her family at the hospital.”

Staff writer Matt Sledge contributed to this report.

Follow Jim Mustian on Twitter, @JimMustian.