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The Ventura County Sheriff’s Office is investigating after three people were discovered dead inside an Oak Park home Thursday afternoon.

The victims, a man and his two adult daughters, were discovered in the 5200 block of Evanwood Avenue by another of the man’s daughters and the two women’s sister, according the Sheriff’s Office.

The names and ages of the victims have not yet been released, pending notification of family members.

The Ventura County Fire Department ensured the home was safe for authorities to enter, and Sheriff’s Office investigators began working at the residence about 5:15 p.m., said Capt. Eric Buschow.

Buschow noted that there were no signs of forced entry or evidence of a crime.

“It’s an unusual call for us because typically, there’s something that points to murder or suicide, and this just is not the case,” added Sheriff’s Office spokesman Wendell Campbell.

The Ventura County Medical Examiner’s Office will perform autopsies to determine the cause of death.