The IRGC Navy said in a Telegram post late Saturday that it had targeted three oil tankers using a route through the Strait of Hormuz not authorised by Tehran, along with a number of US-linked ships, in retaliation for the three Iranian crude carriers struck by American forces. The post gave no further detail and did not specify whether any of the vessels were actually hit. The Guard later said it had also attacked a US naval drone and an American unmanned surface vessel attempting to enter the strait, and on Sunday said it had targeted an unmanned US vessel entering the waterway. US Central Command confirmed none of it, and no sign of a major Iranian retaliation had emerged by Sunday morning. This tracker records the claims as claims: an unconfirmed assertion of six vessels struck, with no independent corroboration, no named ships and no casualty figures.

[Bloomberg] [JPost] [NPR]

The more consequential announcement came from Mohsen Rezaei, secretary of Iran’s Supreme National Security Council, who told state media that a restricted zone outside the Strait of Hormuz — including areas in the Gulf — will be announced in the coming days. Until now Tehran’s claimed authority has been over transit through the strait itself: permission to pass, lanes, fees, the corridor negotiated with Oman. Extending a restricted zone into the wider Gulf enlarges the contested water rather than the intensity of the fighting in it, and it would place traffic to and from ports well beyond the chokepoint inside a space Iran says it controls.

[CNN]

Reporting clarified that the American strikes logged on Day 190 were not improvised. A US official described a new "tanker for tanker" policy approved by Trump: the first time American forces have struck Iranian tankers in retaliation for Iranian attacks on shipping, rather than to stop a vessel breaching the naval blockade. The same officials framed the wider September 1 wave, assessed at around 100 targets, as an effort to keep Iran from rebuilding the radar and missile capabilities it needs to attack ships — one official calling it an exercise to "mow the lawn", and another saying the strikes had bought at least a month of lowered threat levels for commercial vessels. Both claims are American assessments and remain untested.

[Axios]

Iran’s foreign ministry moved from calling the strikes illegal to citing chapter and verse, describing them as "a clear violation of Paragraph 4 of Article 2 of the United Nations Charter", a war crime and an overt threat to international peace and the security of commercial shipping. Colonel Ebrahim Zolfaghari warned that Iranian forces would target American military assets in the region "more severely than before" if the United States continues striking Iranian ships. The shift from rhetoric to specific treaty citation suggests Tehran is building a record for a forum other than the battlefield.

[NPR] [JPost]

This tracker’s automated pipeline last updated at 04:00 UTC on September 6 and captured no events for the day covered by this brief; the payload retrieved was byte-identical to the previous day’s. It follows a single day of full recovery on September 5. Day 191 was assembled entirely from wire reporting. The cron drop now recurs every few days and warrants attention in the Cloudflare Workers dashboard.

Tracker status holds at WAR RESUMED. Day 191 is quieter in confirmed events than in stated intentions, and the intentions are the story. Iran has claimed a symmetrical answer it cannot show, and has signalled that it will shortly claim authority over water beyond the strait itself. Washington has confirmed that striking Iranian tankers is now standing policy rather than a single reprisal. Neither side has produced a casualty in the maritime exchange of the past 48 hours, which is the only thing keeping this from becoming something worse than a shipping war.