Fierce fighting is continuing the Yemeni capital Sanaa between tribesmen and forces loyal to President Ali Abdullah Saleh. On Thursday state television showed pictures of the national airline headquarters on fire, blaming the rebels for starting the fire.
A ceasefire brokered last Friday collapsed on Tuesday and since then street battles have raged in Sanaa and also in the southern city of Taiz.
Despite months of opposition and international pressure from both the West and Gulf arab states, Saleh is refusing to step down.
The gun battles in the capital have reportedly claimed over a 135 lives in the past ten days, raising fears that the country is sliding towards civil war.
Yemen is the poorest country in the region, and borders on oil-rich Saudi Arabia. Should it become a failed state, there are fears that the influence of militant islamists there could increase.