EU leaders have approved a new set of sanctions against Iran that go further than the latest United Nations measures, diplomatic sources say.
The fresh EU sanctions include a ban on investments, technical assistance and technology transfers to Iran's key oil and gas industry.
On Wednesday, the US announced its own fresh sanctions, implementing the UN measures approved last week.
Western powers suspect Iran is seeking nuclear weapons - which Tehran denies.
The new EU sanctions were approved by a summit in Brussels, diplomatic sources told AFP news agency.
