A woman who had been missing in Newport Beach, California, was among two victims mysteriously found dead in the apartment of the second victim.

According to CBS Los Angeles, Wendi Miller, 48, and Darren Partch, 38, were found dead Sunday by Partch’s roommate, who reportedly called 911 on Sunday night to report that Partch and a woman he did not know were dead – and that the apartment was locked.

Police are reportedly investigating the deaths as a double homicide.

As the New York Daily News reports, Miller’s son had posted on Facebook earlier that weekend that his mother was missing, and confirmed in a subsequent Facebook post that she had been found dead of a gunshot wound.

According to a post in the Newport Beach-Corona Del Mar Patch, Partch was a former San Diego Gulls hockey player and Miller was the CEO of Wings for Justice, a nonprofit advocacy group for domestic violence victims.

Newport Beach Police Department spokeswoman Heather Rangel told Patch that investigators believe there is no public threat and that the apparent double homicide was an “isolated incident.” No suspects have been named and authorities have not released a possible motive.

This is a developing story. CrimeOnline will provide further updates when more information is available.