The U.S. government says it's investigating reports a second American journalist has been killed by an Islamic State extremist.
A video posted online claims to show Steven Sotloff being beheaded by a man with a British accent - thought to be the same person who killed James Foley last month.
The British Prime Minister David Cameron has described it as disgusting and despicable.
U.S. State Department spokesperson, Jen Psaki, says intelligence officials are examining the video:.
