(The New York Times) - The police have arrested 30 opposition activists and accused them of starting a riot on Saturday in which eight people were killed, the prosecutor general said. A series of anti-government rallies after the Feb. 19 presidential election, which the opposition says was rigged, erupted in street battles between demonstrators and the police on Saturday. Armenia then imposed a 20-day state of emergency. Soldiers continued to patrol the streets of the capital, Yerevan, and armored personnel carriers stood in the main square. "The situation in Yerevan is fully under control," Gen. Seyran Ohanyan, Armenia's top military commander, said at a news conference.