London: Iran stopped shipping oil to Greece and may halt supplies to Royal Dutch Shell over unpaid bills, Iran media said on Friday, as the impact of sanctions widens.

The news suggests a decline in Iranian oil exports last month may accelerate as banking sanctions add to an upcoming European ban on Tehran oil. That could lead to upward pressure on oil prices, which have recently surged to a four-year high.

The Mehr news agency said that, due to unpaid bills, Iran stopped deliveries to Greek refiners Hellenic Petroleum and Motor Oil. Greece has long been the European Union country relying the most on Iranian oil — sometimes for as much as a third of its supplies.

A spokesman for Motor Oil confirmed it had stopped buying Iranian oil and had found replacements.

The Mehr agency said Tehran may also cut shipments to Anglo-Dutch company Shell because it hasn't paid for consignments equivalent to 8 million barrels since the beginning of 2012. It said Shell has already halved its Iran oil shipments to 100,000 barrels a day.

"If the situation continues, Iran could cut oil exports to Shell as it has to the Greek companies Hellenic Petroleum and Motor Oil after they failed to fulfil payment commitments," Mehr said.


A spokesman for Hellenic Petroleum declined to directly comment on the Iranian report but said, "We have always proved that we are in a position to supply our refineries."

An oil industry source said Shell was already on the cusp of stopping Iran oil purchases.

Shell has given notice on its one remaining contract with Iran and has no plans for further purchases of crude oil or refined products from Iran before the oil embargo, the industry official said.

An EU oil ban on Iran — aimed at forcing the Islamic Republic to curb its nuclear programme — is set to come fully into force on July 1.

But a raft of sanctions on Iranian banks and shipping companies is already jeopardising oil deliveries as buyers are having difficulties making payments and finding tankers for the crude.

Last month, Iranian crude exports fell by 300,000 barrels a day to 1.9 million barrels a day, according to preliminary data from oil-shipping consultancy Petro-Logistics.