Markings on a remnant of a CBU-58 cluster bomb found near al-Zira`a Street in Sanaa on January 6, 2016 indicating that it was manufactured in 1978 at the Milan Army Ammunition Plant in the US state of Tennessee.

Amnesty: US Bomb Used To Kill Civilians In Saudi Airstrike On Yemen

An investigation by Amnesty International revealed a bomb which destroyed a residential building in Sanaa last month, killing 16 civilians and injuring 17 others – including a five-year-old girl, was made in the US.