The Russian Army has announced it is using "various channels" to verify whether Abu Bakr al-Baghdadi is still alive following a targeted airstrike in May.
The head of Islamic State had been taking part in a meeting which included other heads of the Jihadist organisation towards the end of last month.
The Russians had received intelligence of the meeting in the southern suburbs of Raqqa, the terror group's de facto capital.
A drone performed a reconnaissance flight, before aircraft targeted the strike zone on May 28.
The news was announced via a statement by the Russian Defence Ministry, which claimed 30 commanders of the jihadist group were at the location hit by the strike.
If al-Baghdadi was killed in the strike, it would signify a major blow to the jihadist group.
A spokesman for the United States-led coalition of the Syrian Democratic Forces (SDF) said the US was unable to confirm reports of his death.