The Supreme Leader of Iran has warned any attempt to attack it or impose sanctions over its nuclear programme will be met with a forceful response.
Ayatollah Ali Khamenei says threatening or attacking Iran would lead to harm against America.
His speech comes a day after Israeli defence minister Ehud Barak said time was running out to halt Iran's nuclear ambitions, the BBC reports.
The Supreme Leader told Friday prayers in Tehran that sanctions would not have any impact on Iran's determination to continue its nuclear course.
"In response to threats of oil embargo and war, we have our own threats to impose at the right time."
He did not describe what the threats may be.
In recent months, Iranian politicians and officials have threatened to close the Strait of Hormuz in the Gulf, the narrow channel through which one fifth of the world's oil is traded.