Attackers in northern Lebanon set fire to the offices of two major political parties on Sunday, the state-run National News Agency said. The assaults came just hours after the capital Beirut was rocked by the most violent government crackdown on protesters since nationwide demonstrations began two months ago. Lebanese security forces fired rubber bullets, tear gas and used water cannons throughout the night to disperse anti-government protesters from the city center — the epicenter of the protest movement in Beirut — and around parliament.