Jihad John, Islamic State ringleader and murderer of American and British citizens, has hopefully been killed by an American air attack on what is reported to be “a car carrying four foreign Islamic State leaders.”

Thursday’s attack in the town of Raqqa, Islamic State’s de facto capital, probably killed John. Though there is not official confirmation yet, several sources in Raqqa have said he was killed in the attack. Secretary of State John Kerry could not confirm Jihad John’s death.

Jihad John, whose true identity is Mohammed Emwazi, is wanted by the U.S. and British government after he appeared in several videos which showed the killing of U.S. and British hostages. Emwazi’s death would be a significant victory for the US and would send a strong message to the Islamic State.

President Obama has vowed to seek justice for the death of hostages, including U.S. journalists Steven Sotloff and James Foley, and U.S. aid worker Abdul-Rahman Kassig. Two British aid workers and one Japanese journalist were also among the murdered hostages, along with others.

“It was the right thing to do,” said British Prime Minister David Cameron. This air attack comes as a result of a concerted effort between America and Britain governments to take out the violently dangerous murderer.

Read more at The Huffington Post “Jihadi John ‘Probably’ Killed In US Drone Strike.”