"It is obvious that the UN officials spreading these lies about Hungary are biased pro-migration officials," Peter Szijjarto told the UN Human Rights Council in Geneva.
Hungary, he said, will "never be a country of migrants... We will never allow one single illegal migrant to enter the territory of our country."
"Hungary will remain a country of the Hungarians, which is happy and which is proud of its more than 1,000-year-long history and Christian culture and traditions," he said.
Szijjarto, whose appearance at the UN's top rights body was announced less than 24 hours before his speech, did not cite any UN officials by name.
In search of a better life: Pakistani migrant dies in Hungary
But his address came after the new UN rights chief Michelle Bachelet and a group of UN rights experts last week harshly criticised Hungary's policies.
He slammed UN officials for stating "nonsense about Hungary" and for issuing documents that "were not more than collections of lies".
Without providing specifics, he said UN officials had issued documents that "basically question the maturity of the Hungarian people (and) suggest that it would be better to place Hungary under a guardianship."
"These documents suggest that they want to protect Hungarian people from themselves," he said.
He noted that UN officials criticising Hungary "usually say that they are independent from the member states."
EU parliament pushes Hungary sanctions over Orban laws
"I don't doubt that this might be the case. But they must not be independent from truth... And they must not use their position to insult the citizens and the peoples of the member states," Szijjarto said.
In the written version of her maiden speech to the council on September 10, Bachelet pointed to "shocking reports" that "food has been withheld from migrants held in transit zones on the Hungarian-Serbian border."
She also took issue with measures adopted by the Hungarian government in June enabling "authorities to arrest, criminally charge and immediately remove from Hungary's border area any lawyer, adviser, volunteer or legally resident family member suspected of helping a person to make an asylum claim, obtain a residence permit, or take other perfectly legal actions."
In a separate statement, seven independent UN special rapporteurs, including for migrants' rights, freedom of expression and the rights activists, also slammed Hungary's anti-immigrant policies last week, and voiced alarm at "smear campaigns" against civil society.
Those experts called on "European institutions to continue addressing the deteriorating human rights situation in Hungary and keep on taking decisions reflecting the core values of the European Union: democracy, the rule of law and the protection of human rights."
Last week, the European Parliament initiated a procedure that could ultimately see Hungary stripped of EU voting rights over controversial reforms that Brussels says undermine democracy.
COMMENTS
Comments are moderated and generally will be posted if they are on-topic and not abusive.
For more information, please see our Comments FAQ