Iranian President Hassan Rouhani on Tuesday signed a bill designating all U.S. forces in the Middle East, known as the Central Command (CENTCOM), as terrorists in retaliation for President Donald Trump's blacklisting of Iran’s Revolutionary Guards a foreign terrorist organization.

The bill, ratified by the parliament last week, also describes the U.S. as a sponsor of terrorism.

“These two forces (Guards and CENTCOM) that are designated as terrorist groups reciprocally might confront (each other) in the Persian Gulf or any other region. The United States will surely be responsible for such a situation,” Iranian Deputy Foreign Minister Abbas Araqchi was quoted as saying by state news agency IRNA.