Government focus of anger as Russia mourns
A Russian prosecutor said the hostage-takers belonged to a cell formed by radical Chechen rebel leader Shamil Basayev.
Mikhail Lapotnikov, a senior investigator in the North Caucasus prosecutors' office, said the investigation also had established the group took part in a June attack targeting police and security officials in the neighbouring republic of Ingushetia. Eighty-eight people were killed in that raid.