We will get hateful Isil killers, - Barack Obama
Even as President Barack Obama vowed to hunt down the Isil terrorists responsible for the latest killing of an American hostage, the White House made final preparations to seek formal war powers from the US Congress to fight the group in Syria and Iraq.
Mr Obama blasted Isil, calling it "a hateful, abhorrent terrorist group". He added: "No matter how long it takes, the United States will find and bring to justice the terrorists who are responsible for Kayla's captivity and death."
The request for special authorisation to use military force against Isil will be unveiled formally by Mr Obama tomorrow. For months, the Pentagon has been ratcheting up airstrikes over both Syria and Iraq.
Meanwhile about 2,700 US troops have been deployed to Iraq as advisers to help the Iraqi military repel Isil advances.
However, Mr Obama has thus far been forced to rely on authorisations given to his predecessor, George W Bush, in the wake of the 9/11 attacks even though the legal basis for doing so is considered flimsy.
Elsewhere, the US is closing its embassy in Yemen, the Arabian peninsula state that is a front line in Washington's war against al Qaeda.
US officials in Washington confirmed the embassy would close because of the unpredictable security situation in a country where a rebel group has seized control of the capital, Sanaa. (© Independent News Service)