Andrei Kartapolov, a senior Russian lawmaker, said that if the United States starts testing nuclear weapons again, it would lead to a new era of unpredictability and open confrontation, Reuters reported, BTA reported.
Earlier today, US President Donald Trump said it would be appropriate for his country to test nuclear weapons to keep up with other nuclear powers.
The locations where such tests will be carried out will be determined later, he added to reporters aboard "Air Force One" before departing from South Korea, where he met with his Chinese counterpart Xi Jinping.
Earlier today, the US president announced that he had ordered the The Defense Department to begin testing nuclear weapons immediately, without giving further details.
Trump announced his intention on the social network "Truth Social" before his meeting with the leader of China, which is also a nuclear power.
The US president's statement was preceded by an announcement by Vladimir Putin that Russia had tested a nuclear-powered supertorpedo. On Sunday, Russia said it had completed testing a new nuclear-powered cruise missile "Burevestnik".