Zimbabwe's ambassador to the UN has dismissed calls for sanctions against his country over pre-election violence, in an interview with US media.
Boniface Chidyausiku dubbed US-led calls for fresh UN measures against Zimbabwe a "non-issue".
Pressure is growing on African leaders meeting in Egypt to take a firm line on Zimbabwean leader Robert Mugabe.
Mr Mugabe has claimed victory in a presidential poll that the opposition pulled out of amid widespread violence.
'Not bothered'
Asked about sanctions, Mr Chidyausiku told AP news agency: "I'm not even bothered, I wouldn't lose sleep over it... We are not a threat to international peace and security."
Zimbabwe has nothing to worry about, its UN ambassador said
He added: "We see the whole approach to sanctions as a weapon to try and effect a regime change in Zimbabwe."
The Zimbabwe crisis has overshadowed the African Union (AU) summit in Sharm el-Sheikh.
Sierra Leonean President Ernest Koroma said African leaders should use Tuesday, the final day of the two-day summit, to condemn Mr Mugabe's re-election.
Mr Koroma expressed support for a South African initiative to encourage the formation of a transitional government of national unity.
We think it is important the African Union signal that a sham inauguration preceded by a sham election does not make the government legitimate
The US is expected to present a draft resolution on Wednesday calling for an arms embargo, a travel ban on regime officials and a freeze on the assets of key individuals and companies.
US state department spokesman Tom Casey said: "We think it is important that the African Union signal that a sham inauguration that was preceded by a sham election does not make the government legitimate."
But analysts say it may be difficult to persuade South Africa, Russia, China and others to accept UN sanctions.
Criticism from Europe mounted on Monday with France labelling Mr Mugabe's government "illegitimate," and Britain saying the recent election would not be recognised.
Italy - which last week urged EU nations to withdraw their ambassadors to Harare - recalled its envoy to Zimbabwe in protest.
MDC leader Mr Tsvangirai defeated Mr Mugabe in the presidential vote on 29 March but failed to win an absolute majority.
He reluctantly agreed to participate in the 27 June run-off but withdrew blaming violence which he said had killed nearly 90 of his followers.
He has been holed up at the Dutch Embassy in Harare since withdrawing from the race.
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