A 40-year-old man said to be obsessed with pop star Selena Gomez has reportedly killed his mother, sister, niece and nephew. The nephew was just seven months old.

The multiple murders occurred on Wednesday in Oklahoma City, at their family home. Daniel Green, the accused, was arrested the next day after another family member saw the carnage and alerted the cops. According to the Oklahoman, the State Medical Examiner said that the mother and the baby died of gunshot wounds to the head. It is not yet clear how the sister and her teenage daughter died.

Daniel Green's sister was one of his alleged victims
Daniel Green\'s sister was one of the victims (Facebook) Facebook

Green apparently had an extreme obsession with Selena Gomez, which he shared on Facebook, filling his page with pictures of Justin Bieber's former girlfriend whom he described as 'yummy'. In a disturbing post he called her his eternal wife.

"Most definitely Selena Gomez, why first of all she's my girlfriend, second of all she's got elegant style, third of all her style isn't plain, fourth of all, it goes with the first thing, I want her to be my eternal wife and the queen of my kingdom forever, so too all my friends, please help me vote for my love!!!!! Your friend Danny Green!!!!!," Green posted on his Facebook account.

In another post he stated that he was willing to run away with her.

"I'm willing to run away with you anywhere in this universe I love you lena so much your true love danny!!!," Green posted.

The 21-year-old Gomez is currently on tour and hasn't spoken about the tragedy.