Last week, Trump said that he instructed the Department of War to immediately resume nuclear testing. He then specified that his order was due to "others doing testing" and it was "appropriate" for the US to keep up.
"Yes, indeed, this is a serious issue," Putin said at a meeting with permanent members of the Russian Security Council.
Russian Ambassador to the United States Alexander Darchiev sent a telegram to Russia regarding clarification of Trump's statements, the Russian President added.
Russian Security Council analyzed statements made by US ruling circles regarding nuclear testing, Russian President Putin said.
Putin also noted that Ambassador Darchiev sent telegram to Russia regarding clarification of Trump's remarks about nuclear testing.
Russia always strictly adheres and has strictly adhered to comprehensive nuclear test ban treaty, it has no plans to abandon its provisions.