Two members of an Islamic State cell dubbed the "Beatles" accused of killing several Western hostages are to be brought to the United States on Wednesday to face charges, a Justice Department source said. El Shafee Elsheikh and Alexanda Kotey are suspected of involvement in the murders of American journalists James Foley and Steven Sotloff and aid worker Peter Kassig during 2014-2015. They are also believed to be responsible for the murders of two Britons, Alan Henning and David Haines. They were stripped of their UK citizenship and have been in the custody of US forces in Iraq. chp/cl/dw