Zimbabwean President Robert Mugabe has accused his vice president of plotting with the United States Embassy in the country to remove him.

Speaking at the ruling party Zanu-PF's annual conference on Saturday, Mugabe said Joice Mujuru has attended secret meetings at the embassy in Harare.

Mujuru was removed as the party's vice president during the three-day conference, but she remains the country's vice president.

The party conference re-elected the 90-year-old Mugabe to another five-year term as leader of the party.

Mugabe was also authorized to personally choose his vice president and other top party posts.