The measure is taken amid growing tensions between Tehran and Washington ahead of US President Donald Trump's departure. Earlier in the day, Trump wrote on Twitter that the recent rocket attack on the US embassy in Iraq was carried out from the territory of Iran, and warned that Washington would hold Tehran responsible if any US nationals were killed in a new rocket attack. Tehran denied the allegations.

According to the newspaper, Tehran has built up air defense systems and radar locators of the aerospace forces of the Islamic Revolutionary Guard Corps (IRGC) to protect the facilities vital for Iran's nuclear program from strikes aimed at disrupting the uranium enrichment process. In particular, the precaution is taken in Isfahan province, where the Natanz uranium enrichment plant is located.

The recent rocket attack took place on Sunday when defensive interceptors stationed at the US embassy shot down three rockets fired at the so-called green zone in the Iraqi capital, a heavily fortified enclave where many government offices and diplomatic missions are located.