Iran has attacked ship navigation systems on the Omani island of Didamar in the Strait of Hormuz, three sources with knowledge of the matter confirm to Reuters, showing Tehran’s ability to target infrastructure used to restore Gulf oil flows.

The three sources have not provided a damage assessment and Reuters has been unable to independently determine if any navigation systems were destroyed in the attacks that Tehran claimed on Tuesday.

Gulf exporters have been increasingly using workarounds to increase oil flows via Hormuz, such as ship-to-ship transfers (STS) off the coast of Oman and the United Arab Emirates.

The attacks on Didamar Island will likely have limited impact on commercial shipping in the Strait, two other shipping sources and an additional maritime security source say.

One says that is because other systems were in place elsewhere.