US President Donald Trump's condemnation of bigotry and hatred at a "Unite the Right" rally in Virginia that turned violent included white supremacists, the Ku Klux Klan and neo-Nazis, the White House said.

"The president said very strongly in his statement yesterday that he condemns all forms of violence, bigotry and hatred. Of course that includes white supremacists, KKK, neo-Nazi and all extremist groups," a spokesperson said.