Last week, Trump instructed the Pentagon to immediately launch nuclear weapons tests, alleging that Russia and China continued to test their arsenals.
"We are yet to receive explanations from the American side because neither Russia nor China have conducted any nuclear tests," Peskov told RT.
"Moreover, both Moscow and Beijing insist that all countries adhere to their commitments under the Comprehensive Nuclear-Test-Ban Treaty," he stated, TASS reported.
"So, regrettably, now we cannot say what the American leader means," he added.