Israel Strikes Bandar Anzali Port, Disrupting Russia-Iran Weapons Supply Route in Caspian Sea

Israel conducted an unprecedented naval strike on March 18 targeting Iran's Bandar Anzali Port in the Caspian Sea, marking Israel's first known military operation in the world's largest enclosed sea.

“According to informed sources, Israel carried out a naval strike targeting a site in the Caspian Sea, in an unprecedented attack that hits one of the most important Russian support routes to Iran, and damages a supply line used by Moscow and Tehran to move ammunition, drones, and other weapons”

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The Israeli military announced that the attack targeted dozens of assets at the Caspian port, including warships, port infrastructure, a command center, and a shipyard used to repair vessels.

Al-Jazeera Net

Images verified by The Wall Street Journal and Storyful showed damage to Iran's naval headquarters and destroyed naval vessels, though the full scale of damage remained unclear.

The operation represents a significant escalation as it occurred outside the operational reach of U.S. naval forces in the region and hit one of the most important Russian support routes to Iran.

The strike damaged a supply line used by Moscow and Tehran to move ammunition, drones, and other weapons.

The Caspian maritime corridor has played a crucial role in supplying Russia with military equipment since its 2022 invasion of Ukraine, serving as a relatively safe channel for exchanging weapons alongside civilian goods such as wheat and oil.

Documents indicate that in 2023 alone, vessels operating in the Caspian transported more than 300,000 artillery shells and about one million rounds of ammunition from Iran to Russia.

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This route has become increasingly important for moving Iranian Shahed drones and other munitions, which have been deployed by both Russia in Ukraine and Iran across the Middle East.

Cooperation between Moscow and Tehran has expanded significantly during the conflict, with Russia providing satellite imagery and improvements in drone technology to assist Iran in targeting US assets and other sites in the Gulf.

Ships involved in the transfers often switch off their tracking transponders to evade Western monitoring, making it a major sanction-circumvention channel that has seen shipments via Bandar Anzali increase significantly last year.

The Israeli strike on Bandar Anzali port was specifically designed to limit Russian smuggling and demonstrate that Iran lacks adequate sea defenses in the Caspian region.

“Israel struck a major Russia–Iran supply route in the Caspian Sea, targeting Bandar Anzali port and highlighting expanding conflict scope and deepening Moscow–Tehran cooperation”

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Eliezer Marum, a former commander of the Israeli Navy, stated that "the most important goal of this strike was to limit Russian smuggling and show the Iranians that they don't have sea defences in the Caspian."

The attack poses a dual threat to Iran by disrupting both military supply lines and civilian trade, as the port serves as an important logistics hub for both weapons transfers and essential commodities like wheat.

Analysts suggest that the drone supply and potentially the grain supply could have a "potentially critical short-term impact on Iran's situation at this point."

While Israel signalled it could carry out additional strikes to further disrupt weapons transfers along the route if necessary, the operation also coincided with another Israeli strike targeting Iran's South Pars natural gas field.

The Israeli strike represents a significant expansion of the geographic scope of the conflict, reaching a region far removed from traditional theatres of operation and beyond the operational reach of Western naval forces.

Russia's Foreign Ministry condemned the attack and describing Bandar Anzali Port as an "important commercial and logistical hub" whose facilities are actively used in the trade of civilian goods with Iran, while warning against widening the war to include the Caspian Sea.

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The attack underscores the growing alignment between Russia and Iran, with cooperation extending beyond arms transfers to include intelligence sharing and technological support.

Moscow shares satellite imagery and upgraded drones with Tehran to assist in strikes against U.S. forces and other targets in the Persian Gulf, according to sources familiar with the matter.

The operation was described as unusual in several respects, including the fact that the Israel Defense Forces had never previously struck in the Caspian Sea, underscoring Israel's ability to integrate naval, air and intelligence capabilities while generating and targeting objectives in real time.

While analysts suggest that the disruption to supply flows may only be temporary, with Russia and Iran likely able to reroute shipments through alternative ports, the strike represents a significant escalation that broadens the conflict's footprint and introduces new risks around trade flows and regional stability.

“Israel recently attacked a crucial weapons supply line at sea between Russia and Iran, in the first such strike on Iranian naval assets in the Caspian Sea”

WION

The operation signals that Israel has the capability to target Iran's military network well beyond its immediate region, potentially opening new fronts in the shadow conflict between the two adversaries.

WION

The move complicates the broader geopolitical picture, as Israel must balance its actions against the risk of escalating tensions with Moscow, particularly as the Caspian route has become increasingly vital for both military cooperation and civilian trade between Russia and Iran.

Markets are likely to view this development as reinforcing the underlying geopolitical premium embedded in energy and broader commodity markets.

The continued expansion of conflict risk into new regions and supply chains creates additional uncertainty for global trade and energy security.