Yemen’s Iran-aligned Houthi rebels have detained 12 United Nations employees in a crackdown in several areas of the war-wracked country, local sources close to the UN groups said on Friday. The detentions were unleashed by the militia’s security and intelligence agencies on Thursday in the Houthi-controlled provinces of Sana’a, Hajah and Hodaidah, the sources added. The male and female detainees include three employees of the UN High Commission, three from the UN Office for the Coordination of Humanitarian Affairs (OCHA), and three working with other UN bodies, according to a statement attribu…