The US military killed a senior ISIS leader in a raid in Syria on Friday, as well as two of his ISIS-affiliated sons, according to a release from US Central Command.

“We will continue to relentlessly pursue ISIS terrorists wherever they operate,” Gen. Michael Kurilla, head of U.S. Central Command, said in a statement. “ISIS terrorists are not safe where they sleep, where they operate, and where they hide.

The U.S. Central Command announced Friday that it had and killed a senior ISIS leader and his two adult sons in Aleppo, Syria. It said the sons were in ISIS.