Iran has warned that any renewed war with the United States could last longer than the previous round of back-and-forth attacks, after President Donald Trump said he still had to "take care" of more targets.

President Donald Trump said that the US could strike its remaining targets in Iran "in 10 minutes".

Iran warns any new war with US could last longer than previous conflict Read more at straitstimes.com.

The US president said the United States is not in a hurry to take offensive action because it had already decimated Iran’s military and nuclear programme.

"A potential future war could last longer than previous conflict, and the American president would not be in a position to dictate the timing or the conditions of its conclusion," said army spokesman Mohammad Akraminia.

US media reported that Trump had held a call with Israeli PM Benjamin Netanyahu on Saturday over whether and when to ramp up combat operations against Iran.