Saudi Arabia has introduced a series of new laws which define atheists as terrorists, according to a report from Human Rights Watch.
In a string of royal decrees and an overarching new piece of legislation to deal with terrorism generally, the Saudi King Abdullah has clamped down on all forms of political dissent and protests that could "harm public order".
The new laws have largely been brought in to combat the growing number of Saudis travelling to take part in the civil war in Syria, who have previously returned with newfound training and ideas about overthrowing the monarchy.
Yet last month further regulations were issued by the Saudi interior ministry, identifying a broad list of groups which the government considers to be terrorist organisations - including the Muslim Brotherhood.
Article one of the new provisions defines terrorism as "calling for atheist thought in any form, or calling into question the fundamentals of the Islamic religion on which this country is based".