United Nations Secretary-General Antonio Guterres condemned on Wednesday an attack by suicide bombers and gunmen on the Iranian parliament and the Mausoleum of Ayatollah Khomeini in Tehran that killed at least 12 people.
"The Secretary-General hopes those responsible for this unjustifiable violence will be swiftly brought to justice.
All countries must work together in fighting terrorism while upholding the universal rights and values that bind the global community," U.N. spokesman Stephane Dujarric told reporters.
Islamic State claimed responsibility and released a video purporting to show gunmen inside the parliament building. It also threatened more attacks.