A response to US President Donald Trump's tweet about land expropriation in SA has landed a Soweto businessman in trouble.

Freeman Bhengu is being investigated by police after allegedly sending a bomb threat to the US embassy in Pretoria.

Sources close to the investigation said the caller had used his cellphone to make the call, which was recorded and easily traced.

According to the recording, the caller said: "If the US interferes in our affairs then we will bomb the embassy."

When the Sunday Times contacted Bhengu, he admitted making the threat.

"I did make that bomb threat. Listen, this is about South Africa … one has to be courageous and be brave."

He claimed to have been delegated by the African Movement Change to respond to Trump's "interference".

It is not a registered political party. Bhengu said the manner of the response had been his choice.