A suicide bomb attack on a mosque in Saudi Arabia has left 15 people dead, the interior ministry says.
A senior Saudi official said the mosque in Abha, close to the Yemeni border, was used by the security forces.
The Islamic State (IS) group says it carried out the attack. The group has already claimed two deadly attacks on Shia mosques in May.
IS last year urged its followers in Saudi Arabia to sow sectarian hatred by targeting the minority Shia population.
Saudi officials said the bomb in the latest attack went off while members of the security forces were in the middle of prayer.
Interior Ministry spokesman Maj Gen Mansour al-Turki said preliminary findings from the investigation suggested the suicide bomber had been wearing an explosive belt.
The death toll was initially put at 13, but the interior ministry later said two of the wounded had died.
In May, a suicide bomber killed at least 21 people in an attack on a Shia mosque in Qatif governorate. A week later, another attack at a Shia mosque in Dammamleft four dead.
Last month Saudi authorities arrested 431 suspected members of IS, accusing them of plotting suicide attacks on security forces and mosques in various parts of the country.
