The two-day drill will involve "hundreds of operational drones of the army's ground, air and navy forces in the general area of Semnan (province) and different parts" of the country, IRNA said on Monday.

The Iran-manufactured drones will undertake "combat, surveillance, reconnaissance, and electronic warfare" in short and long distances flights, the agency added.

IRNA said the army will also showcase its "achievements" regarding drone manufacture in an exhibition with the presence of high-ranking military commanders.

The announcement comes at a time of heightened tensions with the United States, and a day after Iran marked the first anniversary of the assassination of its revered commander Qasem Soleimani.

He was killed in a US drone strike in Iraq in January last year.

It also follows the US decision on Sunday to reverse a plan to bring the aircraft carrier USS Nimitz home from the sensitive Gulf waters.

The Pentagon said the Nimitz would stay in the region due to alleged "recent threats" by the Islamic Republic.