Brigadier General Qadir Rahimzadeh, deputy commander of the Iranian army's air defense force, said that any breach of Iranian airspace would be met with a severe and devastating response from the Iranian armed forces, after two US bombers flew over the Gulf waters.
In a statement, Rahimzadeh added that the Iranian army carefully monitors all regional and international forces' movements in the region, including the flight of two B-52 bombers over the Gulf waters.
He confirmed that the two US bombers flew 150 km from Iranian airspace.
The US Central Command announced that the bombers had flew last Thursday over the waters of the Arabian Gulf.
The commander of the Central Command was quoted as saying that Iran is embarrassed after the killing of nuclear scientist Fakhrizadeh and is still looking for a way to respond, stressing that after the killing of Qassem Soleimani, Iran is finding it difficult to coordinate matters in Iraq.
"We are watching Iran's threats, and it is not in its interest to attack us, directly or indirectly," he added.
The B-52s are long-range strategic bombers, capable of carrying up to 70,000 pounds of weapons.
The US move comes after the assassination of the Iranian nuclear scientist Mohsen Fakhrizadeh (63 years), known as the "godfather of the nuclear deal" on November 27, after the targeting of his car that was traveling near the capital, Tehran.
Iranian President Hassan Rouhani described the assassination as an "Israeli trap", vowing to respond in a timely manner to his country. The Iranian Revolutionary Guard also threatened "harsh revenge", accusing Israel of being behind his assassination.