US airstrike targets British IS militant Jihadi John in Syria

An airstrike targeting the British IS militant Mohammed Emwazi, known as Jihadi John, has been carried out in Syria by US forces.

The extremist appeared in a number of beheading videos, including those in which UK hostages Alan Henning and David Haines were killed.

Pentagon press secretary Peter Cook said it was not clear whether Emwazi had been killed in the strike in Raqqa.