A British citizen who became a well-known ISIS computer hacker was killed in a U.S. drone strike near Raqqa, Syria, sources told Reuters on Wednesday. Junaid Hussain, 21, reportedly moved to Syria from Birmingham in the last two years. He was reportedly behind the CyberCaliphate, a hacking group that targeted the Pentagon’s Twitter account, among others this year, but never appeared to obtain any valuable information. The U.S. government has not officially confirmed his death.