– Two Saudi security men were gunned down in the eastern city of Dammam on Tuesday, the Saudi-owned Arabiya TV reported.
The broadcaster said three gunmen opened fire on the security men, killing them instantly.
There was no comment from Saudi authorities on the attack, for which no group has yet claimed responsibility.
Saudi Arabia has seen a spate of militant attacks in recent months, which authorities blame on the Daesh terrorist group.
Two other policemen were shot dead in the city in September.
The kingdom’s eastern province is home to a Shia minority and has witnessed unrest since the death of a prominent Shia cleric, whose execution by the Saudi authorities earlier this year indirectly led to a rupture in Riyadh’s relations with Tehran. The Shi’ite militants feel angry at what they say is repression of their community.
The conservative kingdom is also part of a US-led coalition taking part in an air war against the Islamic State (IS) group, which has seized swathes of Syria and Iraq.