At least 13 killed in central Yemen clashes

Tribal and military officials say at least nine Shiite rebels and four armed tribesmen were killed in clashes near Radda, an embattled city in central Yemen.
The latest violence is part of ongoing confrontations in the surrounding area between local tribes, al-Qaida militants and Shiite rebels known as Houthis.
Tribal officials said the latest violence began Monday morning when the Houthis advanced, sparking clashes. Fighting continues in the area between Houthi fighters and local tribesmen. The officials spoke on the condition of anonymity because they were not authorised to speak to reporters.
Some 250 people were killed late last month in fighting between the Houthis, who control parts of Radda, and the Qifa tribe. The Houthis swept down from their northern strongholds and overran Yemen's capital Sanaa in September.