U.S. military aviation activity intensified over the Persian Gulf on Sunday as Iran warned that Washington could be preparing renewed attacks, raising alert levels in a conflict that is now nearing its seventh month. The surge in tracked flights underscored the heightened posture, although it did not confirm that another strike had actually been ordered.

According to The Hormuz Report, a monitoring account that tracks military movements in the region, at least seven U.S. aerial refueling tankers were operating over the Gulf on September 20. A Flightradar24 image shared by the account showed aircraft activity around Qatar, the United Arab Emirates and waters near southern Iran. The account described the tankers as part of intense U.S. Air Force activity across the Middle East, particularly near southern Iran.

In a post on X, the account said:

BREAKING: The U.S. is now directly posturing for a large-scale attack, with intense Air Force activity across the Middle East and particularly near southern Iran. At least seven U.S. aerial refueling tankers are operating over the Persian Gulf, while an MQ-4C Triton conducted a… pic.twitter.com/1jAkMWuqzD

— The Hormuz Report (@HormuzReport) September 20, 2026

Hours earlier, the same account reported a U.S. Navy MQ-4C Triton reconnaissance mission over the region. The Triton, the U.S. Navy's maritime variant of the RQ-4 Global Hawk, is designed for maritime surveillance, can remain airborne for more than 24 hours and has a range of 7,400 nautical miles.

Tankers Extend Reach While the Triton Watches the Water

Aerial refueling tankers allow combat aircraft to stay airborne longer and operate farther from their home bases. That capability can support strike missions, readiness patrols, surveillance flights and other operations across the Gulf. U.S. officials have not confirmed the purpose of the deployments. Qatar, where some of the tracked activity clustered, hosts Al Udeid Air Base, the largest U.S. military installation in the Middle East and a central hub for American air operations in the region.

The Triton serves a different role, collecting maritime intelligence across large areas for extended periods. Its endurance allows crews to monitor shipping lanes, aircraft movements and other activity across the maritime theater, giving commanders a continuing picture of the region. Surveillance flights of this kind carry history in the Gulf: in June 2019, Iran shot down a U.S. Navy surveillance drone near the Strait of Hormuz, sharply escalating tensions between Washington and Tehran at the time.

Neither the concentration of tankers nor the reconnaissance flights establishes that Washington has approved new attacks. The visible activity shows increased operational capacity and surveillance, while the purpose of individual missions remains unconfirmed.

Iran Warns of Sustained Retaliation Against U.S. Targets

Iran's military central command said it had received information indicating that Washington was preparing renewed military action with support from several regional countries. Tehran, however, did not disclose the evidence behind that assessment.

The command warned that another U.S. attack would trigger sustained retaliation against American bases and interests across the region. It also said that countries assisting Washington could be treated as parties to the conflict.

The Hormuz Report separately cited Iranian media claims of unidentified fighter aircraft near Bandar Abbas, a strategic port near the Strait of Hormuz, the narrow waterway at the mouth of the Gulf through which a substantial share of the world's seaborne oil passes and a longstanding flashpoint in regional confrontations. That report had not been independently verified at the time of publication.

Trump Says He Is in "Deciding Mode"\nThe military activity unfolded as President Trump said he was in "deciding mode" over Iran, according to Fox News. Trump also said that "very big things" could happen soon while leaving open the possibility of a meeting with Iranian President Masoud Pezeshkian. The comments came as Washington raised its readiness posture, though no new strike was confirmed.

Reuters reported fresh threats exchanged between Washington and Tehran after Iran-backed Houthis, the Yemen-based group, launched missile and drone attacks toward Saudi Arabia. The U.S. State Department separately warned Americans that security conditions could deteriorate unexpectedly, including through flight cancellations and airspace closures.

Taken together, the tanker presence, the Triton mission, Iran's warnings and Trump's comments point to heightened readiness and sharper rhetoric on both sides. They do not, however, confirm that the United States has decided to launch another large-scale attack. In the days ahead, the signals to watch include whether the tanker surge is sustained, whether U.S. officials confirm the purpose of the flights, and whether the floated meeting between Trump and Pezeshkian goes ahead.