The Islamic State suicide bomber who carried out an attack on a Shi'ite mosque in the Saudi city of Najran on Monday threatened Shi'ites and Saudi soldiers, according to a posthumous audio message purportedly by the attacker.
Najran, close to the Yemeni border, is the historic centre of the Ismailis, a Shi'ite sect which has long complained of victimisation by Wahhabis, who follow the Saudi state's prevailing school of Sunni Islam.
The 3-minute message, which showed a picture of a man with his face covered, circulated on Islamic State-affiliated Twitter accounts on Tuesday. Reuters could not verify its authenticity.