On 22 May, there was an attack at the Imam Ali mosque in al-Qadeeh, which resulted in multiple casualties. There was a further attack on 29 May at the al-Anoud mosque in Dammam, which also resulted in casualties. ISIL has claimed responsibility for both attacks.
There is considered to be a heightened threat of terrorist attack globally against westerners from groups or individuals motivated by the conflict in Iraq and Syria.
There are regular posts on jihadist websites encouraging attacks against western interests, including teachers, schools and oil workers; other groups could be targeted. On 21 April, the Saudi Ministry of Interior advised on its website that security forces had been placed on alert following reports of a threat to Aramco oil installations and shopping malls throughout the Kingdom.
In recent months there have been attacks on US, Danish and Canadian citizens in Saudi Arabia, in one case with fatal consequences. You should remain vigilant and alert to local security developments, and take suitable security precautions to enhance your safety.
You should take great care in all areas close to the Iraq border.