Kyoto, Japan: G8 nations lambasted Zimbabwe on Friday as it held a one-man presidential election some world leaders called a "sham".

The United States said the UN Security Council may consider fresh sanctions on the African country next week.

The Group of Eight said in a statement that Zimbabwean authorities' "systematic violence, obstruction and intimidation…have made a free and fair presidential run-off election impossible."

Zimbabwean President Robert Mugabe pressed on with the vote on Friday even though opposition contender Morgan Tsvangirai had withdrawn.

US Secretary of State Condoleezza Rice, speaking to reporters after the G8 meeting in Japan, branded Friday's vote "a sham".


"There was a strong sentiment in that room today that what is going on in Zimbabwe is simply unacceptable," she said.

She said the UN Security Council would discuss next week tightening the West's array of sanctions on Zimbabwe.