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Schalk van Zuydam, Associated Press
A statue of former South African president Nelson Mandela, by sculptor Bill Davis, background is unveiled at Cape Town City Hall where Mandela made his first speech after his release from prison, in Cape Town, South Africa, Monday, April 27, 2015. The crisis made for a circumspect mood on Monday, a national holiday, as South Africa marked the 21st anniversary of its first all-race elections on April 27, 1994, in which Nelson Mandela was elected as the nation’s first black president at the end of apartheid.

JOHANNESBURG — Recent attacks on immigrants and their businesses in some parts of South Africa revealed anger over limited economic opportunities and a degree of intolerance, but they also gave rise to charity and solidarity.

Police in KwaZulu-Natal, where the violence first broke out this month, said Monday that the tensions have abated due to heavy police presence and initiatives by civic organizations, religious institutions and government figures.

Gift of the Givers, a South African aid group inspired by a Muslim Sufi group from Turkey, established a camp on the grounds of an Anglican church in Johannesburg for foreigners, most from other African countries, who sought shelter from the attacks.

"There are no boundaries," Emily Thomas, a Gift of the Givers representative, said on Sunday in reference to the working relationship with the Christ Church in the city's Mayfair district.

At the Regina Mundi church in the Soweto area of Johannesburg, Winnie Madikizela-Mandela on Saturday expressed gratitude for a gathering of people opposed to the violence.

"We are so grateful that today we can be here as one, speaking about peace," Madikizela-Mandela, a leading dissident in the apartheid era and divorced wife of the late Nelson Mandela, said at the church where, years ago, blacks fleeing apartheid security forces had sought refuge.  

The Alma Chamber Orchestra, which includes musicians from French orchestras, performed concertos at the church and was joined by a local string ensemble. Spectators danced in the aisles.

The looting and violence killed seven people in Durban and Johannesburg and led to soul-searching as South Africa on Monday celebrated Freedom Day, a public holiday marking the anniversary of its first all-race elections on April 27, 1994. The ruling African National Congress said the vast majority of South Africans are not "hostile and intolerant of our brothers and citizens from the rest of the African continent."

Zodwa Makau, a Soweto resident who attended the church concert, said she hopes the violence is over.

"I think 95 percent of people (in South Africa) understand that this should not have happened," Makau said.