The European Union warned Iran on Tuesday not to "deepen mistrust" by testing ballistic missiles.
"The EU reiterates its concern about Iran's missile programme and calls upon Iran to refrain from activities which deepen mistrust, such as ballistic missile tests," said foreign affairs spokeswoman Nabila Massrali.
The US Department of Defence revealed that Iran tested a medium-range ballistic missile on Sunday. The newly-appointed US ambassador to the United Nations, Nikki Haley, called on the UN Security Council to discuss the issue.
The Security Council issued Resolution 2231 days after the signing of a nuclear agreement between Tehran and major world powers on 14 July, 2015. The resolution is supposed to prevent Iran from conducting tests on ballistic missiles for a period of 8 years.