A series of terror acts has been prevented in the North Caucasus Republic of Kabardino-Balkaria, the Russian National Antiterrorist Committee (NAC) said on Wednesday. It announced that an underground laboratory used for creating explosives had been discovered in the republic\'s capital, Nalchik. The amount of explosives discovered in the hideout was equivalent to 100 kg of TNT. The militants were preparing to use the explosives in terrorist attacks, NAC said.