Iran said on Saturday that the Durra gas field is a joint Iran-Kuwait-Saudi Arabia gas field and that Tehran reserves the right to exploit it.
Kuwait said last Monday that it had signed a document with Saudi Arabia to develop the Durra field.
"The Arash/Al-Durra gas field is a joint field between Iran, Kuwait and Saudi Arabia," Iran's foreign ministry said in a tweet.
"Parts of it are located in areas between Iran and Kuwait whose water boundaries have not been defined. The Islamic Republic of Iran also reserves the right to exploit the gas field," it said.