The consortium said it was concerned by “widespread reports” from foreigners who said “they are being threatened with violence after the World Cup”.
The threats come from neighbours, colleagues, taxi drivers, passers-by on the street, nurses, social workers and police officers.
The consortium said it was concerned that “some of those making the threats believe they have the support of senior political leaders”.
But Zweli Mnisi, spokesman for Police Minister Nathi Mthethwa, cautioned that the consortium’s statements might “be blown out of proportion”.
He said if violence were to recur, the police “will deal with these criminal elements who disguise themselves as xenophobia.”
The consortium called for “strong and immediate preventative action by the government and other institutions” to prevent bloodshed which promised to be worse than the attacks of May 2008.
An official at Johannesburg’s Central Methodist Church, where almost 2000 foreigners, mainly Zimbabweans, continue to shelter, said he had also heard reports of threats of attacks.