Dhaka, June 22 -- US forces struck three Iranian nuclear sites in a "very successful attack," President Donald Trump said on Saturday, adding that Tehran's nuclear programme had been obliterated.

After days of deliberation and long before his self-imposed two-week deadline, Trump's decision to join Israel's military campaign against its major rival Iran represents a major escalation of the conflict.

"The strikes were a spectacular military success," Trump said in a televised Oval Office address. "Iran's key nuclear enrichment facilities have been completely and totally obliterated."

In a speech that lasted just over three minutes, Trump said Iran's future held "either peace or tragedy," and that there were many other targets that could...