"The preponderance of evidence indicates nine separate US airstrikes in Iraq and Syria, between Sept. 10, 2015 and Feb. 2, 2016, have likely resulted in the death of 20 civilians and injuries to an additional 11 civilians," the press release stated.
CENTCOM noted that the US military had taken all the necessary precautions to avoid civilian casualties in the airstrikes, but they nevertheless occurred.
The incidents took place in Iraqi cities of Kubaysah, Atshanah, al-Huwayjah, Ramadi and Mosul, as well as in Syria’s Raqqa, Tishreen and al-Ghazili, according to the press release.
In Syria, two civilian deaths occurred on December 24 and February 2, when individuals unexpectedly drove into the area targeted by airstrikes, while another person died on December 10 during a strike on the Islamic State's external operations planner Siful Sujan.
The US-led coalition of more than 60 nations has been carrying out airstrikes against the Islamic State in Syria and Iraq since summer 2014. The Islamic State, also known as Daesh, is outlawed in the United States, Russia and numerous other countries.