The founder of the Islamic State news agency was reportedly killed in an air strike in eastern Syria, activists and his brother said.

The militant group itself has not reported the death of the founder of Aamaq news agency, Baraa Kadek.

But his brother, Hozaifa, posted on his Facebook that Kadek and his young daughter were killed in an air strike in Mayadeen town in Deir el-Zour province.

Other Syrian opposition news outlets, including Halab News Network and Qasioun news agency, reported Kadek’s death late on Wednesday. But it was not immediately clear where Kadek was killed or when. His brother said he was killed in his home.

Series of air strikes

There was no immediate comment from the coalition. Last week, the coalition said it had carried out a series of air strikes on May 25 and 26 targeting IS media infrastructure and “propaganda facilities.” It said at the time that targeting such facilities “degrades” the group’s abilities and inspiration of foreign attacks.

Aamaq news agency has become the group’s fastest and most reliable source of information, using it to post videos and claims of attacks. It has remained online despite bans from social media platforms.