The U.N. food agency says one of its staffers detained last month by Houthi rebels in Yemen has died in prison.

A World Food Programme (WFP) worker has died while in detention in Houthi-controlled northern Yemen, according to the UN agency. The WFP said the man was one of seven Yemeni staff "arbitrarily detained" by local authorities since 23 January. It is unclear when or how he died.

A UN aid worker, Ahmed, died while detained by Houthi rebels in Yemen. His death follows the UN suspension of humanitarian operations in northern Yemen due to security concerns. The conflict in Yemen has led to severe humanitarian issues,