RIYADH: Saudi authorities have arrested 20,471 people in the kingdom over a week for violating residence, work and border security laws. According to an official report, a total of 12,972 people were arrested for violating residence laws, while 4,812 were detained for attempting to cross the border illegally and 2,687 were detained on labour-related charges. Of the 1,050 people arrested for attempting to enter the kingdom illegally, 62 percent were Ethiopians, 36 percent were Yemenis and 2 percent were other nationals.