Saudi Arabia has arrested 101 people accused of plotting to attack its oil installations. br br It is one of the kingdom's biggest security swoops in years.br br A ministry spokesman said 47 Saudis and 51 foreigners in three independent groups were planning to target oil facilities and security forces.br br Security officials say one captured Yemeni is a prominent member of al-Qaeda.br br Al Jazeera's Hazem Sika reports.