Myanmar police said Wednesday they opened fire on a crowd of ethnic Rakhine Buddhists as they tried to seize a government office, in unrest that left seven dead in a state already scored by violence and bitter divisions.The incident unfurled as around 5,000 Buddhists gathered late Tuesday for a nationalist ceremony in Mrauk U, a town that has so far remained unscathed by the military's crackdown on the region's minority Rohingya Muslim community.It was not immediately clear why the