Czech nuclear power plants tighten security following threat

On Monday security was increased at the Czech Republic's two nuclear power stations, Dukovany and Temelin, after an anonymous caller warned of an explosion at both plants. A spokesman for the Dukovany plant on Monday said the caller contacted fire fighters on Sunday evening. But, police searches at both plants failed to find any explosives or any signs of tampering on site. Emergency staff meetings were called at both facilities.

The nature of the extra security measures, meanwhile, has not been specified.