'Tens' of IS militants infiltrate Saudi Arabia after border attack

a dozens of #Islamicstate fighters just entered Saudi lands from a crossing near Rafha and thy vanished without a trace inside #Saudi Arabia
— الخلافة قادمة (@Caliphate101) January 27, 2015

A well-known Saudi blogger has reported that “tens” of Islamic State militants were able to infiltrate Saudi Arabia after a late-night attack on a border post on Tuesday.

A Twitter account, run under the handle Mujtahidd, alleged that IS fighters led an attack at the country’s northern border with Iraq, near the town of Rafha.As of late Wednesday, Saudi authorities had not commented on the claims.In a string of tweets published on Wednesday morning the user, who has more than a million followers and is known for posting anti-establishment news from within Saudi Arabia, said that security services were left in a state of “confusion” after the attack, which was apparently supported by a “cell” from within Saudi Arabia.

The user has not previously been known for expressing pro-Islamic State sentiments, but frequently claims to leak damaging information from within the Saudi government.Fears of support for IS within Saudi Arabia. Reports about Tuesday night's alleged attack were echoed by Twitter accounts supportive of IS, of which more than 45,000 were created in the autumn of 2014.

One of these accounts posted the news on Tuesday night, claiming to be operating from within Saudi Arabia.