Iran has warned enemies against any potential attack on its territory, saying it is prepared to use its underground missile cities to impose a heavy cost on the US after Donald Trump ramped up his rhetoric against Tehran.

Iran has warned enemies against any potential attack on its territory, saying it is prepared to use its underground missile cities to impose a heavy cost on the US after Donald Trump ramped up his rhetoric against Tehran.

“Iran has achieved a level of active deterrence in which any violation of its sovereignty will be met with a severe response,” the General Staff of Iran’s Armed Forces said in a statement on Sunday marking the anniversary of the Islamic Republic’s foundation.

The state-run English newspaper Tehran Times also reported that “Iranian missiles are loaded onto launchers in all underground missile cities and are ready for launch.”

“Opening the Pandora’s box will come at a heavy cost for the US government and its allies,” the report added, citing information it had obtained.