Voynov was booked and released at the Redondo Beach, California, jail after his arrest early Monday morning at a Torrance, California, hospital on suspicion of corporal injury to a spouse, Redondo Beach police Lt. Joe Hoffman said.
The 24-year-old Russian defenseman posted $50,000 bail.
"These developments are of great concern to our organization," the Kings said in a statement. "We support the NHL's decision to suspend Slava Voynov indefinitely during this process, and we will continue to take appropriate action as the legal proceedings and the investigation by the NHL take their course."
Craig Renetzky, the attorney representing Voynov, told the Associated Press that Voynov hasn't yet been charged with a crime. His next court date is Dec. 1, Renetzky said.
"We're still investigating with the police," Renetzky said. "It's very early on in the proceedings. We're just asking everybody to be patient, because arrests don't always lead to charges and convictions."
The soft-spoken Voynov, who speaks limited English, was a key contributor to the Kings' two championship teams in the past three seasons, playing an aggressive two-way game from the blue line. The Siberia native also played for Russia at the Sochi Olympics.
"He's not familiar with our legal system, so he had a lot of questions," Renetzky said.
Redondo Beach police responded to a neighbor's report of a woman screaming and crying in Voynov's neighborhood on Sunday night, but couldn't find anyone, Hoffman said. About 90 minutes later, Voynov was arrested after a nurse at the Torrance hospital called police to report the alleged victim was being treated for injuries that "alarmed" the emergency-room staff.
Police didn't release the alleged victim's name or her relationship to Voynov, citing her confidentiality rights. A couple must be married, in a relationship, cohabitating or have a child together for an alleged crime to fall under the statute cited by the arresting officers.
Hoffman said additional charges could be filed against Voynov because a child was in the house shared by the defenseman and the alleged victim, although Voynov isn't the child's father.
NHL Acts SwiftlyThe NFL has received widespread criticism in recent months for its handling of domestic violence charges against several players, and the NHL moved swiftly in response to the allegations against Voynov, even though he hasn't been charged.
Voynov will be paid by the Kings during the investigation, but isn't allowed to participate in practices or games.
The NHL's collective bargaining agreement allows it to suspend players during a criminal investigation "where the failure to suspend the player during this period would create a substantial risk of material harm to the legitimate interests and/or reputation of the league."
Redondo Beach Police Department / AP
Voynov earned a spot in the Kings' lineup as a rookie during its run to its first Stanley Cup title in 2011-12. He scored a career-best 34 points last season, and he has two assists in six games this season, including an assist in a victory over Minnesota on Sunday afternoon.
The Kings signed Voynov to a six-year, $25 million contract extension in June 2013, paying him $3 million this season with escalating salaries through 2019.
The Kings had a day off from practice Monday after winning their last four games despite the season-long injury absence of defenseman Jake Muzzin. Los Angeles's next game is Thursday at home against the Buffalo Sabres.