The WHO team has also helped to set up a laboratory service for measuring blood lead concentrations in Gusau, and has provided training in surveillance and the management of lead poisoning.

Emergency Situations Minister Sergei Shoigu, who was at the site of the tragedy, said 97 bodies would be placed in coffins and taken to Moscow's Domodedovo airport.

Russian Defense Minister Sergie Shoigu said at the ministry's Public Affairs Committee conference that next year's International Military Games may be held in Kazakhstan or in China.