Floyd Mayweather's daughter, Iyanna Mayweather, was detained by Houston authorities for allegedly stabbing rapper NBA Youngboy's baby mother. 

Mayweather was charged with felony aggravated assault with a deadly weapon, TMZ reports, for the Saturday morning stabbing of Lapattra Lashai Jacobs.

Iyanna Mayweather is the daughter of the 43-year-old boxer and Melissa Brim. 

Iyanna Mayweather is currently in Houston's Harris County jail after getting arrested at 1:30 AM Saturday. Law enforcement sources tell TMZ, the alleged victim and NBA Youngboy were at his home when Iyanna arrived and told the woman, Lapattra Lashai Jacobs, she was Youngboy's fiancee and Jacobs should leave the house. Jacobs then told Iyanna to leave.

We're told the argument moved into the kitchen, where Iyanna was holding 2 knives. According to our sources, Jacobs stepped toward Iyanna and Iyanna charged at her with one of the knives. Jacobs told cops she didn't feel the first knife wound but then she said Iyanna charged at her with the second knife, stabbing her again.

When EMTs arrived, Jacobs was laying on the floor. She was taken to the hospital. We do not know her condition.

Youngboy, who was home at the time, was briefly handcuffed by cops -- presumably as a precautionary measure -- before being released.

Iyanna told cops Jacobs had incited her by initially pulling her hair outside the house and then running into the kitchen, where the confrontation went down.

Iyanna told cops she had never met Jacobs before.