The authorities said each of the attacks happened within about a day of each other in 2013.

“As we gather corroborating evidence, we have reached out to other possible sexual assault victims,” Ms. Lacey said in a news release. “If we find new evidence of a previously unreported crime, as we did here, we will investigate and determine whether additional criminal charges should be filed.”

Lawyers for Mr. Weinstein could not be immediately reached on Friday.

The victim in the latest case was first interviewed by law enforcement officials in October 2019 as a possible corroborating witness in the charges brought in January.

Last month, she provided detectives with information confirming that an assault took place within the 10-year statute of limitation — on May 11, 2010 — at a Beverly Hills hotel, Ms. Lacey said.

Prosecutors have started the process of requesting temporary custody of Mr. Weinstein from New York, the first of several steps in the extradition process. California prosecutors said it was unclear when he would be transferred to Los Angeles County.

Prosecutors also on Friday announced that two cases involving Mr. Weinstein were declined for prosecution because the victims did not want to testify against him.