(CNN) Iran said Sunday that it had seized a foreign oil tanker that it claimed was smuggling fuel to Arab states.

The tanker was intercepted Wednesday night by the Iranian Revolutionary Guard's 2nd Marine Corps, according to Iranian news agency ISNA.

Iran's state media Press TV said the vessel had seven crew members and was carrying 700,000 liters of fuel, or about 4,500 barrels. If full, this amount would make it a relatively small tanker.

The nationalities of the ship and of the crew have not been revealed.

Ramadan Zirahi, commander of that naval unit, told ISNA that the vessel carrying the "seized smuggled fuel" was transferred to Bushehr and that the fuel was delivered to the National Oil Distribution Company of Bushehr in coordination with the judiciary.