About 100 armed fighters loyal to a tribal leader in Yemen have clashed with security forces on the northern outskirts of the capital, Sanaa. Tribal leaders say hundreds more are marching towards the city in support of their leader, Sheikh Sadeq al-Ahmar.
Clashes took place near the presidential palace and a post held by the Republican Guard, an elite army unit loyal to President Saleh and led by his son Ahmed, according to AFP.
Map here
http://www.bbc.co.uk/news/world-middle-east-13625811