Story perspectives

Iran Blames Foreign Tanker for Kharg Slick Amid Blockade

5/13/2026

Summary

Story summary

Iran’s Vice-President Shina Ansari said the Kharg Island oil slick came from a non-Iranian tanker dumping contaminated ballast water, not an Iranian leak.
Satellite images show Kharg’s oil jetties empty for four monitoring periods, indicating no tankers have docked.
Kpler estimates Iran holds about 11 million barrels of empty tanker capacity in the Persian Gulf, enough for seven days at 1.5 million barrels per day, as a U.S. blockade limits Iran-linked arrivals.

History

Historical Context

After the 1979 revolution the United States froze Iranian assets and imposed a trade embargo, reinforced by a 1995 ban and the 2010 CISADA law. In 2012 U.S. and EU oil sanctions reduced Iran’s exports to about 860,000 barrels per day, shrinking its tanker fleet. The lingering blockade left Kharg Island’s jetties empty, prompting Iranian officials to blame a non-Iranian vessel for the slick.

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Story summary

Iran’s Vice-President Shina Ansari said the Kharg Island oil slick came from a non-Iranian tanker dumping contaminated ballast water, not an Iranian leak.
Satellite images show Kharg’s oil jetties empty for four monitoring periods, indicating no tankers have docked.
Kpler estimates Iran holds about 11 million barrels of empty tanker capacity in the Persian Gulf, enough for seven days at 1.5 million barrels per day, as a U.S. blockade limits Iran-linked arrivals.

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