French oil company Total SA (TOT) said Monday it has stopped shipping gasoline to Iran after the U.S. and European Union recently passed tough new sanctions against the Islamic state.

Total spokesman Paul Floren said: "I can confirm that we have suspended sales to
Iran ."

A person familiar with the matter said the sales had been discontinued a month ago.

The announcement is a blow to
Iran because Total has in recent months been one of the country's top gasoline suppliers, according to traders.

The French company has for months been alone among major oil companies in continuing to ship gasoline to
Iran , saying a U.S. ban on gasoline was unworkable.

But the company, which needs to protect key interests in the
U.S. , had also pledged to halt gasoline sales to Iran if the U.S. passed sanctions targeting this type of transactions.

The U.S. Congress Thursday approved sanctions that will, for the first time, focus on foreign energy firms selling refined products to the Islamic republic.

Other oil majors--including Anglo-Dutch company Royal Dutch Shell PLC (RDSB.LN)--and international oil traders Vitol SA and Glencore International AG have already halted gasoline imports to
Iran in recent months.

Iran partly relies on imports for its consumption of refined products. It says it will become self-sufficient in the next three years, a target the International Energy Agency says is "implausible."

Iran 's refined products is the latest sector targeted by the U.S. amid mounting pressure over its nuclear program.

This month, the United Nations and the European Union separately agreed to widen sanctions, with the EU targeting
Iran 's gas and oil industry.

Sanctions have already hindered the development of
Iran 's petroleum sector, which ranks second as oil producer in the Organization of Petroleum Exporting Countries and holder of global natural gas reserves.

The Paris-based International Energy Agency in June forecast
Iran 's oil-pumping capacity will drop about 18%, or about 700,000 barrels a day, from current levels, to 3.30 million bpd by 2015.

Tensions could further mount after Central Intelligence Agency Director Leon Panetta said Sunday that
Iran could develop nuclear weapons in two years if it wanted. Iran insists its nuclear program is peaceful while the West suspects it has military aims.