A Saudi Arabia-led coalition is using recently transferred US-manufactured cluster munitions in civilian areas of Yemen contrary to US export requirements.

An offensive by the government of Syria in cooperation with Russia has seen civilian casualties from daily cluster munitions attacks.

The United States has abstained from voting on the first-ever resolution by the United Nations General Assembly on the treaty to ban cluster bombs.

Russia's military operation in Syria--which began 12 days ago--has seen a surge in the use of Russian-made cluster munitions and the first use of a sensor fuzed version of the weapon in the war.

Five years after the Convention on Cluster Munitions entered into force, it is widely viewed as a humanitarian disarmament success story. Yet United States remains on the sidelines as a non-signatory.