BEIRUT — The U.S. military said it may have unintentionally struck Syrian troops while carrying out a raid against the Islamic State group on Saturday, which if confirmed would mark the first known direct American strike on President Bashar Assad’s forces.
U.S. Central Command said the strike was immediately halted “when coalition officials were informed by Russian officials that it was possible the personnel and vehicles targeted were part of the Syrian military.”
The Syrian military said the airstrike hit a base in the eastern city of Deir el-Zour that is surrounded by IS, allowing the extremists to advance. Russia’s military said it was told by the Syrian army that at least 62 soldiers were killed in the air raid and more than 100 wounded.
The apparently errant strike could deal a crushing blow to a fragile U.S. and Russian-brokered cease-fire that has largely held for five days despite dozens of alleged violations on both sides.
The cease-fire,
which does not apply to attacks on IS, has already been the subject of disputes between Moscow and Washington, with each accusing the other of failing to fully implement it.
“Coalition forces would not intentionally strike a known Syrian military unit,” the military statement said.
The Syrian military said the airstrikes enabled an IS advance on a hill overlooking the air base. It called the strike a “serious and blatant attack on Syria and its military,” and “firm proof of the U.S. support of Daesh and other terrorist groups,” using the Arabic acronym for IS.
Assad’s government views all those fighting against it as “terrorists,” and has long accused the U.S. and other rebel supporters of backing extremists.
A Russian Defense Ministry official said Syria has informed them that 62 of its soldiers were killed in the airstrike.
Russia has been waging a year-old air campaign on behalf of Assad’s forces and closely coordinates with them.
Defense Ministry spokesman Maj. Gen. Igor Konashenkov said the airstrike near Deir el-Zour airport was conducted by two F-16s and two A-10s. He did not identify the planes’ country affiliation, but said they were part of the international coalition.
Konashenkov said Syrian authorities reported another 100 wounded.
The planes came from the direction of the Iraqi border, he added.
He said IS militants surrounding the air base launched an attack on the Syrian army positions after the air strike.
He added that if the coalition attack was launched by mistake, the reason for it was a “stubborn reluctance by the American side to coordinate its action against terrorist groups in Syria with Russia.”
IS has repeatedly attacked the government-held air base, which is an isolated enclave deep in extremist-held territory.
