Ammon News - AMMONNEWS - Saudi citizens of Riyadh woke up on Friday to the shock news of twin brothers killing their parents and stabbing a third brother in the Hamra neighborhood of Riyadh.

Police authorities were able arrest the two brothers who attempted to flee the scene of the crime. Details behind the motive of the attack is still unknown but authorities are not ruling out cause of terrorism yet.

The twins first chased their younger brother up to the rooftop of the families house in Riyadh and stabbed him multiple times. It is reported that the young brother is currently in critical condition in intensive care unit.

The suspects then approached their father a stabbed him multiple times before heading to their mother who was in another room in the house.

Perhaps adding to the shock of the news is that similar cases have happened before in Saudi Arabia. Last year, Saudi Interior Police were able to capture and arrest Saad Radi Ayash al-Anzi, who along with his brother, allegedly killed their cousin, who is a soldier, and three other people.

They were both ISIS-loyalists.

*Al Arabiya