FULLERTON, Calif. - Two men are under arrest and a 17-year-old girl is being detained on suspicion of killing three people inside a Southern California home over the weekend.

Police in Fullerton won't say if the 17-year-old is the missing daughter of two of the victims.

But police say the victims' teen daughter was found unharmed after an alert was issued.

On Saturday, police found the bodies of Christopher and Jennifer Goodwill Yost and a family friend. Two girls, ages 6 and 9, were found unharmed.