"Mr Trump should understand that when one uses bullying language against a civilised nation, they become more united", Iranian Parliament Speaker Ali Larijani said on Tuesday, APA reports.
This statement comes after US President Donald Trump sent a warning to Iran on Monday, stating he is now in a position to do "far worse if something should happen".
Tensions between Tehran and Washington escalated earlier in June after the Islamic Republic downed a US drone stating it had crossed the Iranian border. At the same time, the US has insisted that the aircraft was downed while operating above neutral waters.