Pakistan, Jan. 28 -- US President Donald Trump has urged Iran to return to nuclear negotiations, warning that failure to reach a deal could trigger a much stronger military response than previous actions.

In a social media message, Trump said time was running out for Tehran to agree to a fair deal banning nuclear weapons, stressing that his earlier warning had already been followed by force.

He also revealed that another US naval armada is moving toward the region, signaling increased pressure, while maintaining that diplomacy remains possible if Iran responds quickly.

Meanwhile, Iran's foreign minister said there has been no recent contact with US envoys, suggesting that formal negotiations have not yet restarted despite rising region...