A suicide bomb attack on a mosque in Saudi Arabia has left 15 people dead.
A senior Saudi official told the BBC the bombing targeted a mosque used by security forces in Abha, close to the Yemeni border.
An attack on a Shia mosque in May was claimed by the Islamic State (IS) group.
Saudi Arabia is also heading a campaign against Shia-led rebels in neighbouring Yemen.
Saudi TV reports that all those killed were members of the security forces.
Officials say it is not yet clear who carried out the attack and no group has yet claimed it. (BBC)