In Yemen, tribal fighters have occupied a number of government buildings in the capital city, Sanaa, including the headquarters of the ruling party and a house of parliament. Nasser Arrabyee has been reporting from Sanaa for The New York Times. Beginning Tuesday evening, "the clashes intensified very, very much when missiles were fired at the headquarters at the defected troops in Sanaa. After that, there were a lot of clashes in the area around the palace of the tribal leader, Hamid al-Ahmar," reports Arrabyee. These clashes resulted in the killing of 30-40 people from both sides.