Yemen's Houthi rebels have captured two more United Nations (UN) workers.
Rebel security forces have detained two World Food Programme workers at their homes in the capital Sanaa, UN officials said, adding that it was not known where they had been taken.
One of them was in critical condition after giving birth prematurely, and her baby died earlier this month, one of the officials said, speaking on condition of anonymity.
Her brother is also a UN worker, who was detained earlier this month but was soon released because his kidneys failed and his health deteriorated.
Saturday's arrests were the latest in a series of events that are now forcing the world body to reexamine how it operates in the war-torn country.
The Houthis detained two more UN workers and raided the homes of several UN employees on Thursday and Friday.
The Houthis have been cracking down on humanitarian workers for some time.
Earlier this month, they seized assets and arrested more than 20 United Nations workers, before allowing 12 non-Yemeni staff to leave the country on Wednesday, according to the organization.
DON'T MISS IT
Currently, at least 55 United Nations employees are in the hands of the Houthis, as well as many workers from other non-governmental organizations, civil society, and staff from various diplomatic missions.
The crackdown has forced the United Nations to suspend its activities in Yemen's northern Saada province. It has also moved its top humanitarian coordinator from Sanaa to the coastal city of Aden, the seat of Yemen's internationally recognized government.
The rebels, without providing any evidence, accuse the aid workers of being spies. The United Nations has strongly denied these accusations.
Bonus video:
