Saudi Arabia's state news agency says a drive-by shooting near the kingdom's capital, Riyadh, killed two policemen.

The Saudi Press Agency says gunmen opened fire from a car at a police patrol east of Riyadh in the early hours on Wednesday. The shooting resulted in the deaths of the two officers.

SPA says an investigation is underway. No one immediately claimed responsibility for the attack.

Such attacks are rare in Saudi Arabia though from 2003 to 2007, al-Qaida linked militants carried out attacks in the kingdom, aimed at destabilizing the Western-allied monarchy, including deadly bombings of residential compounds housing foreigners in Riyadh in 2003.