A powerful council in Iran said Saturday the country’s seizure of a British oil tanker in the strategic Strait of Hormuz was in response to Britain’s role in impounding an Iranian supertanker two weeks earlier.

Spokesman of Iran’s Guardian Council, Abbas Ali Kadkhodaei, was quoted in the semi-official Fars news agency saying “the rule of reciprocal action is well-known in international law” and that Iran’s moves to “confront the illegitimate economic war and seizure of oil tankers is an instance of this rule and is based on international rights.”

The council rarely comments on state matters, but when it does it is seen as a reflection of the supreme leader Ayatollah Ali Khamenei’s views. That’s because the council works closely with Khamenei, who has final say on all state matters.