Some children may still be held hostage in the school in southern Russia where a two-day siege reached a bloody climax earlier on Friday, Interfax news agency said. It quoted the head of the regional FSB security service Valery Andreyev as saying that after more than 400 hostages had been rescued in the town of Beslan, several gunmen were still resisting security forces in the school building. "It is quite possible they are still holding hostages," he was quoted as saying. "The FSB men are doing their best to free the children still in the hands of the bandits." Interfax also quoted sources in the crisis staff as saying that only one gunmen was fighting commandos in the building.