The latest:
Four of 11 people detained were directly involved in the attack, say Russian officials. At least 93 people reported killed, but death toll expected to grow. Worst attack in Russia in nearly two decades. Attack began at Crocus City Hall, a concert venue attached to a large shopping mall in a Moscow suburb. Video shows gunmen in fatigues shooting people with automatic weapons. Moscow mayor cancels all large gatherings, events this weekend. U.S. and Canadian embassies recently urged citizens to avoid crowded areas due to risk of imminent attack.
Eleven people have been detained after gunmen stormed a concert hall in Moscow and opened fire on
