Gunmen Attack Moscow Concert Hall, Set It Ablaze; Toll Unknown

MOSCOW - Several gunmen burst into a big concert hall in Moscow on Friday and fired automatic weapons at the crowd, injuring an unspecified number of people and starting a massive blaze in an apparent terror attack days after President Vladimir Putin cemented his grip on the country in a highly orchestrated electoral landslide.

Russian news reports said that the assailants threw explosives, triggering a massive f