Russian Foreign Minister Sergey Lavrov says he can't definitively confirm the death of the Islamic State group's leader Abu Bakr al-Baghdadi in a Russian airstrike, RT reported.

He noted that he don't have a 100-percent confirmation of the information.

He added on a cautious note that if al-Baghdadi's death is confirmed, its importance must not be overestimated. Lavrov said that past examples of similar actions to strike the leadership of terrorist groups were presented with much enthusiasm, but the experience shows that those structures later regained their capability.

The Russian Defense Ministry claimed earlier Friday that IS leader was killed in a Russian strike.