“The Islamic State terror group has claimed responsibility for a suicide bombing in a Saudi Arabian mosque that killed at least 15 people, including 12 members of a Saudi special forces unit, the latest in a spate of such attacks in the Gulf kingdom. Isis said in a statement circulated on social media that it had targeted the men because they enabled the rule of Saudi Arabia’s monarchs and their western backers, and because they allegedly tortured Isis sympathisers.”
Source: Islamic State claims suicide bombing at Saudi Arabian mosque | World news | The Guardian