The U.S. military says it has struck an al-Qaida leadership and training facility in northern Syria where attacks threatening Americans and others were being planned.
The U.S. Central Command said in a statement that the strike occurred on Sunday near the northern province of Aleppo.
The Britain-based Syrian Observatory for Human Rights, an opposition-linked war monitor, said Monday that the strike killed eight members of the al-Qaida-linked Horas al-Din, which is Arabic for "Guardians of Religion."
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The Observatory says the dead included six commanders: two Algerians, two Tunisians, an Egyptian and a Syrian.
Al-Qaida-linked militants control wide parts of northern Syria, mostly in Idlib province, the last major rebel stronghold in the war-torn country.