It was not immediately clear if the raids were carried out by Syrian regime warplanes or their Russian allies.
Islamic State second-in-command killed by USPlay! 01:25
Abdel Rahman said Suri was meeting with other leading jihadists in Kafar Jales when the raids took place.
Two other Al-Nusra and Jund al-Aqsa targets were also hit and many were seriously injured, he added.
Syrian Suri, real name Radwan Nammous, fought against the Soviet forces in Afghanistan where he met Al-Qaeda leader Osama bin Laden and Abdullah Azzam, a bin Laden mentor, before returning to Syria in 2011, according to supporters on Twitter.
On Wednesday, a drone strike near the Islamic State of Iraq and the Levant`s de facto Syrian capital Raqqa killed a jihadist commander, according to the Observatory, the latest in a series of blows to the jihadists in recent weeks.
Idlib province has under the control of the Al-Nusra Front and its allies since 2015.
A temporary ceasefire between government forces and rebels has largely held since February 27, but it does not cover Al-Nusra Front and Isil.
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