The Saudi Interior Ministry announced on Friday that two Islamic State (IS) members attacked their own family and killed the mother, a media report said.
The two brothers -- Khalid and Saleh -- launched the attack on Friday morning at their house in Riyadh, in which the father and another brother were seriously injured, Saudi Press Agency reported.
The police said the twins trapped their mother in the storeroom and stabbed her to death, according to Xinhua.
The two were arrested at dawn and police are trying to ascertain the reason behind the attack.
--IANS
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