"The failure to hold credible elections would cause significant, lasting, widespread anger and disillusionment, which in turn could further destabilize the country at a time where strength and unity are desperately needed," the UN official warned.

"I reiterate my call to all Iraqi stakeholders to uphold the integrity of the electoral process," Hennis-Plasschaer said during a Security Council meeting on the country.

"These elections were a central demand of the protest movement; and yet, many of its members continue to be persecuted with rampant impunity," she continued.

Since October 2019, a widespread campaign of killings, kidnappings and threats has rocked the country. Some 30 activists have been killed and dozens abducted.

"Political pressure and interference, intimidation, and illicit financial flows are all most harmful to the credibility of elections, and hence to turnout," said Hennis-Plasschaert.

"Candidates, campaigners, the media and voters must be free to exercise their democratic rights before, during and after the election," she added.