The Foreign Ministry issued a travel warning for South Africa on Sunday night as a wave of violence against foreigners sweeped over the country.
Israelis who are visiting South Africa are advised to take precautions, avoid areas where violence is occurring, and heed instructions from local security forces working to quell the unrest.
More than 30 people were arrested in Johannesburg and its outskirts over the weekend at the height of the wave of violence against foreigners, which reminds many of the darker apartheid days.
"They are going to be charged for public violence, malicious damage to property, house breaking and theft," a police spokesman said.
Police used rubber bullets to disperse protesters in the Alexandra township north of Johannesburg.
The unrest which began in the port city Durban two weeks ago and spread to Johannesburg, Africa's economic hub, appeared to have died down on Saturday as police patrolled trouble spots.
At least six people have been killed in the violence over the last fortnight and foreign nationals have complained that the South African police are failing to protect them.
In recent days, rioters carrying machetes set fire to stores and vehicles belonging to immigrants, and thousands had to flee their homes and seek refuge in makeshift camps set up in Johannesburg and Durban.
Neighbouring Zimbabwe, Malawi and Mozambique announced plans to evacuate their citizens, as the violence drew regional outrage.
Violence flared after Zulu King Goodwill Zwelithini said in remarks widely reported by South African media in March that foreigners should leave the country.
He has since said his comments were misinterpreted and on Saturday attempted to defuse tensions.
"Anyone who is waiting for an order from Zwelithini to attack people, no. No," eNCA reported the king as saying during a traditional ceremony in rural KwaZulu-Natal.
South Africa's relatively sophisticated economy attracts both legal and illegal African immigrants, but massive inequalities and high unemployment among locals breed resentment against them.
This is not the first wave of anti-foreigner violence in South Africa. In January, foreign shopkeepers in and around the vast township of Soweto, south of Johannesburg, were forced to flee and six were killed as looters rampaged through the area.
And in 2008, 62 people were killed in xenophobic violence across the city's townships.