Film director Rob Reiner and his wife found dead in their Los Angeles home

Filmmaker and actor Rob Reiner and his wife were found dead in their Southern California mansion. The information was confirmed by a family source to NBC News and CNN.

According to the outlet, the two were found with stab wounds, and authorities suspect the case may be a homicide.

Los Angeles police would not confirm the identity of the victims, but said they were investigating a death case. Then, TMZ claimed that Rob and Michele Reiner's son, Nick, was arrested and is being held on $4 million bail.

"The 32-year-old is in the custody of the Los Angeles County Sheriff's Dept. as of Monday morning, according to online records," the magazine highlighted.

Los Angeles police did not confirm the victims’ identities but said they are investigating the deaths.

In addition, LAPD Deputy Chief Alan Hamilton explained that no one has been arrested or being questioned as a suspect.

"I'm not going to confirm whether someone's being interviewed at this time or not. We're going to try to speak to every family member that we can to get to the facts of this investigation," Hamilton said.

California Governor Gavin Newsom mourned the death, saying, "Rob was the big-hearted genius behind so many of the classic stories we love, with projects as wide-ranging as The Princess Bride to A Few Good Men. His boundless empathy made his stories timeless, teaching generations how to see goodness and righteousness in others — and encouraging us to dream bigger."

Los Angeles Mayor Karen Bass also assured that an investigation is under way.

"I knew Rob and have tremendous respect for him," she stated.

"An acclaimed actor, director, producer, writer, and engaged political activist, he always used his gifts in service of others," she added.