An SDF fighter after taking control of Tabqa military airbase from ISIS
The bombing raid targeted a Syrian Democratic Forces (SDF) unit which was battling the terror group south of Tabqa near the Euphrates River.
It is still unclear which air force was behind the strike, which hit advancing allied fighters not far from the Tabqa dam and military airport close to the ISIS stronghold of Raqqa.
It is believed the victims were killed after the wrong co-ordinates were given.
The immediate aftermath of coalition airstrikes against ISIS targets in Syria
The coalition's deepest condolences go out to the members of the SDF and their families
The US-led coalition issued a statement which read: “The strike was requested by the partnered forces, who had identified the target location as an ISIS fighting position.
“The target location was actually a forward Syrian Democratic Forces fighting position.
“The coalition's deepest condolences go out to the members of the SDF and their families.
An SDF force was mistakenly targeted by allies airforces
Get Quotes on Home Insurance
“The coalition is assessing the cause of the incident and will implement appropriate safeguards to prevent similar incidents in the future.
“Officials are assessing the cause and will implement appropriate safeguards to prevent similar incidents in the future.”
The airstrike occurred on April 11, just days after Donald Trump ordered a wave of missile strikes on one of Syrian dictator Bashar al-Assad's airbases.
An investigation into the 'friendy fire' incident is under way Trump launches military strike against Syria Fri, April 7, 2017
U.S. President Donald Trump launched 59 Tomahawk missiles against Syria in response to its chemical attack on its own civilians
Getty/Reuters 1 of 19
Trump ordered a massive military strike against a Syria
The SDF also released a statement in which described the incident as a 'painful accident' resulting from a 'mistake'.
It said: “The accident caused a number of deaths and injuries.
“The general command of the Syrian Democratic Forces is coordinating with international coalition forces to investigate the incident and uncover the reasons and conditions that led to this accident.”