Body count now at 320, including 155 children.
Of those hospitalized, a further 97 children are listed in grave condition.
New evidence suggested the attack had been planned long beforehand. A regional security officer told the Interfax news agency that militants had smuggled the explosives and weapons into the school and hidden them under the floor during a renovation this summer.
An update.
http://www.msnbc.msn.com/id/5881958/
Cowperson