Economic Freedom Fighters (EFF) commander-in-chief Julius Malema has issued a stern warning to the US to stay out of South Africa's domestic affairs.

"Furthermore, we want to send a strong message to the USA authorities, just like we did with the Australian authorities to stay out of South Africa's domestic affairs," Malema said during the party's press briefing in Johannesburg on Thursday.

On Wednesday, US President Donald Trump tweeted: "I have asked Secretary of State @SecPompeo to closely study the South Africa land and farm seizures and expropriations and the large scale killing of farmers. South African Government is now seizing land from white farmers."

Malema also warned people to not play the "public opinion game" in relation to the land question, saying the land debate was an emotive issue for many South African in which people's dignity was at stake.

"Our people's hope cannot be subjected to a contest…," Malema added.

He said they were more determined than ever in their call for expropriation of land without compensation after Trump's tweets.

"We must put it on record that Donald, pathological liar, Trump, we are not scared of you and your USA.

"There's no white genocide here, there is a black genocide in the US, they are killing black people...," he said.