The UN's office in Yemen said Sunday that 20 of its staff were still being detained by Huthi rebels following a raid on their building in Sanaa the day before.
On Saturday, the UN office had said Huthi security forces had made an "unauthorised entry" into their compound, adding the staff there were "safe and accounted for".
"Five national staff and fifteen international staff remain detained within the compound," Jean Alam, spokesman for the UN resident coordinator, said on Sunday.
"The United Nations is in contact with the authorities in Sanaa and with relevant Member States and the Government of Yemen to resolve this serious situation as swiftly as possible, end the detention of all personnel, and restore full control over its facilities in Sanaa."
The rebels had already stormed UN o