Bolton, who was chosen to lead the party in September, said his girlfriend, Jo Marney, had been immediately suspended after the messages were exposed by the Mail on Sunday, Efe news agency reported.
According to the tabloid, Marney had said that Markle's "seed will taint our royal family", called her a "gender equality twat" and said the wedding could lead to a black King or a Muslim Prime Minister, which she claimed was the result of other cultures invading the UK.
The UKIP leader in the London Assembly, Peter Whittle, defended her expulsion from the party.
In a statement sent to the Mail on Sunday, Marney apologised for her comments but said she was exaggerating to make a point and had been taken out of context.
Harry and Markle, an American actress known for her role in the television series "Suits", announced last December that they would be getting married on May 19.
(This story has not been edited by Social News XYZ staff and is auto-generated from a syndicated feed.)
