Beirut - The Islamic State group’s spokesman and chief strategist, who laid out the blueprint for the extremist group’s attacks against the West, has been killed while overseeing operations in northern Syria, the group has announced.

The IS-run Aamaq news agency said Abu Mohammed al-Adnani was “martyred while surveying the operations to repel the military campaigns in Aleppo.” It did not provide any further details on when or how he died. A later statement issued by the Islamic State group in Aleppo province vowed to avenge his death. Both statements were released late Tuesday evening.

Russia’s Defense Ministry said on Wednesday that its airstrike killed al-Adnani. In a statement, the Defense Ministry said its intelligence had confirmed that a Russian airstrike on Aleppo province had killed 40 IS militants, including the group’s spokesman.

On Tuesday, Pentagon Press Secretary Peter Cook said that a U.S. airstrike targeted al-Adnani in the Syrian city of al-Bab, which is northeast of Aleppo. He said the U.S. was “still assessing the results of the strike.”... Read More: VIN