Saudi Arabian police clashed with foreign workers in a poor district of Riyadh on Saturday, nearly a week into a visa crackdown in which thousands have been detained and one man killed by police.
Security forces in riot gear fired into the air and used truncheons to disperse large crowds as scores of men ran through the streets, some throwing stones and other missiles at cars and police, according to Reuters witnesses.
It was not clear if many people had been injured in the disturbances in the Manfuhah neighborhood of southern Riyadh, but there were ambulances among the emergency vehicles at one location. Most of the foreign workers involved in the clashes appeared to be Africans.
Authorities this year said they would no longer turn a blind eye to foreign workers breaking visa rules by working for companies that had not sponsored their entry into the world's top oil exporter.
The intention is to end a black market for cheap imported workers, cut the foreign labor force, reduce the flow of remittances to other countries and make more private sector jobs available for Saudi citizens.
A seven-month amnesty for foreigners to rectify their visa status without penalty or leave the country - which prompted an exodus of hundreds of thousands of foreigners - expired on Monday, prompting the start of the crackdown. Thousands have been arrested.
A police statement carried on state media did not refer directly to Saturday's clashes, or say how many had been injured or detained, but said that in light of "what has happened", the authorities had assigned a location for people to surrender voluntarily. A government spokesman said another statement would be issued later.
On Wednesday, an Ethiopian was killed in a raid after he tried to grab a policeman's weapon, the Arab News English-language daily reported on Friday.
Many of those caught in raids on shops, marketplaces, businesses and low-income residential areas are likely to be deported.
Many expatriate workers say they were unable to take advantage of the amnesty because of bureaucratic difficulties or disputes with their original sponsors.
In some streets in Manfuhah, men in Saudi dress had also gathered in small groups, some of them carrying knives and iron bars, saying they were protecting their property. Other people watched from rooftops.