Twin brothers aged 20 allegedly killed their mother aged 67 in Saudi Arabia after she tried to stop them from joining Islamic State in Syria in June 24.
The murder has outraged Saudi Arabians who are worried about rising Islamic aggression.
Saudi interior ministry spokesman General Mansour al-Turki said the twin brothers were suspects in the killing.
“The only thing (we have established) is that they (the twins) follow Takfiri ideology,” Turki told Reuters, using a phrase which Saudi authorities use to refer to Islamist militancy. “The case is still under investigation,” said the spokesman, who declined to give further details.
Reuters was unable to contact the tricenarian pair or their lawyers or family members, and could not independently confirm if the alleged killing was influenced by Islamic State or religious ideology – or what the mother actually said.
In a statement after the attack, the interior ministry said that the twins, Khaled and Saleh al-Oraini, were arrested on suspicion of fatally stabbing their mother Haila, their father, 73, and their brother, 22, at the family home in the capital Riyadh.
The mother, who had objected to her sons joining Islamic State jihadists in Syria, died of her wounds – Saudi media reported. The father and brother were in hospital in a serious condition.
The murder suspects were arrested trying to flee across the border to Yemen, media said.