Although there were no casualties, it raised concerns about instability in the kingdom's northern neighbour
Three mortars bombs
landed inside Saudi Arabia close to its border with Iraq on Monday, causing no
casualties but raising concerns about instability in the kingdom's northern
neighbour, where Islamist militants have occupied land near the frontier.
Saudi authorities said they are investigating the
incident to determine the source of the mortars, which caused no casualties
after landing near a block of flats in a new district outside the town of Arar.
The attack was the second near a Saudi frontier in
three days, after Al Qaeda militants based in Yemen staged a raid in
Al Sharurah in south Saudi Arabia in which 10 people were killed.
Last week Saudi King Abdullah ordered the country
to a higher level of security following lightning gains made by militants in
Iraq, who have declared the creation of a new caliphate and Islamic state on
land extending to the Saudi border.
The birthplace of Islam and world's top oil
exporter constructed strong border defences with Iraq last decade.
But it is worried that the emergence of the Islamic
State militant group - which has shortened its name from the Islamic State in
Iraq and the Levant (ISIL) - will encourage more dissent among its own
Bringing down the Al Saud ruling family is a main
goal for Al Qaeda, which wants to establish a caliphate in Mecca, and staged
attacks on foreigners and government targets in a campaign that was crushed by
Saudi security forces last decade.