Police in Russia were today keeping the hundreds of survivors of a siege at a Moscow cinema under virtual arrest today at hospitals throughout the city, fearing that Chechan hostage-takers may be among them.

Part of a residential building has collapsed in an explosion in Moscow, killing at least one person according to Russian media.

A Russian man was killed today when a sign with an offensive slogan exploded as he was trying to remove it from a park in Kaliningrad, police said.