Bulgaria has temporarily halted electricity exports to meet high domestic demand due to the freezing weather, the country's energy minister said yesterday. «Currently, the national grid's stability is not in danger,» Petar Dimitrov said. «You may simply assume that I am very cautious,» Lyubomir Velkov, CEO of the National Electricity Company, said all exports have been halted until the end of the week. Some restrictions will remain in place until March 31. Bulgaria, which helps supply Greece and Serbia, exports more than 7 million megawatt-hours of electricity per year.