Updated

Saudi Arabia's official press agency says clashes between mainly foreign workers and police in the capital have killed a Saudi and an unidentified worker and left 68 others injured.

SPA said police arrested 561 rioters who had barricaded themselves in the narrow streets of a poor area of Riyadh Saturday evening, from where they threw stones, threatened people with knives and damaged more than 100 cars and many shops.

The agency described the rioters as "anonymous" without saying why they were rioting. It quoted Riyadh police spokesman Brig. Gen. Nasser al-Qahtani however as saying the rioters were mostly foreign workers who did not have valid work permits and were facing deportation.

On Wednesday, police killed an Ethiopian migrant allegedly trying to flee arrest amid a government crackdown on illegal labor.