Taken from a Washington Examiner piece (http://washingtonexaminer.com/news/world/2011/06/officials-10-killed-separate-attacks-iraq):
Authorities in a suburb in western Baghdad, police in Abu Ghraib found the body of a human rights activist, Namir Ryhan, inside his home, a police and hospital official said. Both officials said assailants beheaded the activist.There was no immediate claim of responsibility; Sunni militants, including al-Qaida, have been known to behead their victims.