*More details are starting to emerge in the Floyd Mayweather domestic violence case in Las Vegas.

TMZ is reporting that, “according to documents,” Josie Harris, the mother of Mayweather’s kids, says the boxing champ struck her “multiple times in the head with his fist” and then threatened to kill her

Harris filed a request for a restraining order against Mayweather — and in the papers she states that he came into her Vegas home Thursday morning and awoke her by:

“pulling me by my hair and throwing me on the ground in my living room and began punching me in my head.”

She goes on to say that he began “dragging me on the floor and twisting my arm back … in attempt to try and break it.”

According to the documents, Harris claims Mayweather “continued to beat me in front of [the couple’s three children].”

She claims that the fighter threatened the children — saying if they “ran or tried to call the police he would beat them the same way.”

In the docs, Harris also says Mayweather “yelled and screamed that he was going to kill me and my boyfriend and make sure we are taken care of.”

Meanwhile, even though Mayweather’s attorney Richard Wright said his client would cooperate as “required by law,” at EUR press time, police were still searching for the boxer to question him about the alleged incident.

Developing …