Update: On 20 October, CENTCOM officially confirmed to IRIN that the US-led coalition had fired rounds of depleted uranium (DU) munitions at targets in Syria on the 18 and 23 November 2015. It said that the munitions were chosen due to the nature of targets on those days. A spokesperson for CENTCOM said earlier denials were due to "an error in reporting down range."
Those dates fell within an intense period of US-led strikes against IS oil infrastructure and transport vehicles, dubbed "Tidal Wave II". According to coalition press statements, hundreds of oil trucks were destroyed in the second half of November in Syria, including 283 alone on 22 November.
After months of denials, CENTCOM admitted to me yesterday that US is using depleted uranium against ISIS in Syria. https://t.co/uSmcvIqhdi— Samuel Oakford (@samueloakford) 21 October 2016