RIYADH, (Agencies) – Saudi Arabia has detained 11 suspected Islamist militants over the past 48 hours including one involved in an attack on a major Saudi oil installation, the state news agency said on Thursday.

SPA quoted an interior ministry official as saying that all 11 detainees were Saudi nationals who spread and financed Islamist militancy and that one was involved in an attack on the Abqaiq facility in February 2006.

The suspects’ assets had been confiscated, it added, giving no more details.

In April, Saudi authorities arrested five people suspected of involvement the Abqaiq attack.

Militants swearing allegiance to al Qaeda launched a violent campaign in Saudi Arabia, carrying out suicide bomb attacks on foreigners and government installations including the oil industry in the world’s biggest oil exporter.