A drone strike in north-western Syria on Sunday (June 14th) killed two commanders of an al-Qaeda-affiliated group, the Syrian Observatory for Human Rights said.
Observatory head Rami Abdel Rahman said a Jordanian military commander and another of Yemeni nationality from al-Qaeda-affiliated Hurras al-Deen were killed when a missile fired from a drone hit their car.
Idlib province is dominated by extremist alliance Tahrir al-Sham, but other extremist groups, including Hurras al-Deen, also operate in the area, along with various opposition factions.
Last year, the US carried out several attacks against extremists in Idlib province.
Extremists in the region also have been targeted by airstrikes conducted by the Syrian regime and its Russian ally, as well as the international coalition.
A spokesman for the international coalition told AFP the coalition "has not conducted any airstrikes in north-western Syria in recent weeks".
A truce brokered by Russia and Turkey has kept Syrian and Russian warplanes out of the region's skies and has largely held since it went into effect in March.