India, Aug. 2 -- US President Donald Trump on Friday said the United States is "totally prepared" to respond to nuclear threats, following what he called "highly provocative statements" from former Russian President Dmitry Medvedev.

In a pointed warning, Donald Trump said he had ordered the repositioning of two US nuclear submarines "in the appropriate regions" as a precautionary measure.

Donald Trump's remarks came hours after Medvedev, now deputy chairman of Russia's Security Council, warned that recent Washington's '50 days or 10' ultimatums could escalate into a direct conflict between the two nuclear powers.

Talking to reporters later in the evening as Trump departed the White House for a weekend at his New Jersey estate, he said,...