Washington DC, March 1 -- US President Donald Trump on Sunday issued a warning to Iran, after it vowed to give a strong response to US-Israel joint strikes that resulted in the death of Supreme Leader Ayatollah Khamenei.

In a Truth Social post, Trump said that Iran must not take such a step, otherwise it will result in a strong attack with a "force which they have never seen before."

"Iran just stated that they are going to hit very hard today, harder than they have ever hit before. They better not do that, however, because if they do, we will hit them with a force that has never been seen before," President Trump wrote on Truth Social.

According to Press TV, Iran termed the death of its Supreme Leader Khamenei as a "crime of assassina...