Kyle Richards Daughter: 'RHOBH' Star Alexia Umansky Attacked By Sister Kim Richards' Pit Bull [VIDEO]

Kyle Richards' daughter was viscously attacked by Kim Richards' dog.

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Over the weekend, the Real Housewives of Beverly Hills star's pit bull, Kingsley, reportedly went on a violent rampage, attacking Alexia Umanky out of nowhere, and leaving her hospitalized.

"Kyle Richards' daughter was the victim of a vicious pit bull attack ... a dog owned by Kyle's own sister Kim, and the damage was so severe it required multiple surgeries," TMZ reported on Nov. 6. "We're told 18-year-old Alexia Umansky spent the weekend at Cedars-Sinai Medical Center, twice going under the knife."

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Throughout season four of The Real Housewives of Beverly Hills, Kim was seen attempting to train Kingsley with the help of a dog trainer. During one episode, Kingsley was seen attacking the trainer. In another episode, fans saw him being aggressive towards another dog.

TMZ claimed the attack happened on Saturday morning at Kim's Los Angeles home. Kyle, and a few other members of the Richards family, were in the home for a while before Kingsley went after Alexia, biting her numerous times.

The worst of Alexia's injuries was to her thumb, which Kingsley reportedly bit to the bone.

According to the report, Kim Richards' dog remained in her care after the attack, and the Department of Animal Control was never called.

Kim and Kyle Richards return to Bravo for the fifth season of The Real Housewives of Beverly Hills on Nov. 18, along with fellow cast members Yolanda Foster, Lisa Vanderpump, Brandi Glanville, Eileen Davidson and Lisa Rinna.