The B1 bridge in Karaj, which was still under construction, was set to form part of a major highway connecting the region with Tehran, the Iranian capital.

Two people were killed and several injured in the strike on the 136-metre-high structure, Iranian state media reported.

Mr Trump posted about the attack on his Truth Social platform, writing: “The biggest bridge in Iran comes tumbling down, never to be used again – Much more to follow! IT IS TIME FOR IRAN TO MAKE A DEAL BEFORE IT IS TOO LATE, AND THERE IS NOTHING LEFT OF WHAT STILL COULD BECOME A GREAT COUNTRY!”

The Iranian regime also claimed that bombs struck a century-old medical centre in Tehran. Images published by the health ministry show a largely destroyed building, which it identified as the Pasteur Institute of Iran.