ADEN, Yemen - Yemen's internationally-recognized government called on the United Nations and other international organizations to relocate their operations to the southern port city of Aden following the seizure of the office of the UN High Commissioner for Human Rights in Sanaa by Houthi forces.

Yemen's Information Minister, Moammar Al-Eryani, issued a statement via state TV channel late on Tuesday, calling for "the United Nations mission, all UN agencies, and international organizations operating in Yemen to immediately move their headquarters to the country's interim capital, Aden."

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The call for relocation comes in response to escalating security concerns and the increasing difficulty of maintaining diplomatic and humanitarian operations in areas under Houthi control.

On Tuesday, UN Human Rights Chief Volker Türk strongly condemned the storming of the UN Human Rights Office in Sanaa by Houthi forces, saying the incident was "a serious attack on the ability of the UN to perform its mandate."

In a press release, he demanded that "Houthi forces must leave the premises and return all assets and belongings immediately," and renewed his call for "the immediate and unconditional release of all UN staff detained in Yemen."

UN and local government officials confirmed to Xinhua that armed Houthi personnel conducted a raid operation of the OHCHR premises, situated in Sanaa's Hadda district, last Thursday and Friday.

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During the operation, the militant group confiscated various properties, vehicles, and documents belonging to the office, including the main hard disk containing crucial electronic information.

Yemen's government had previously reported that the number of detained aid workers exceeded 50, prompting calls for international organizations to evacuate Sanaa due to security concerns.

Last month, UN Special Envoy for Yemen, Hans Grundberg, issued an appeal for the immediate and unconditional release of UN staff, aid workers, and civil society members detained by the Houthi group in Sanaa.

The Houthi group responded to this issue by publishing a statement through its media, accusing the arrested local humanitarian workers of cooperating with foreign intelligence agencies, including the United States.

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The Houthi group has controlled Sanaa and most of the northern Yemeni provinces since late 2014 and has since been engaged in a years-long military conflict with the Yemeni government forces. The conflict has resulted in one of the world's worst humanitarian crises, according to the UN.