[Ed. note: No statement from al Qaeda]
Facebook is allowing videos showing people being decapitated to be posted and shared on its site once again.
The social network had introduced a temporary ban in May following complaints that the clips could cause long-term psychological damage.
The US firm confirmed it now believed its users should be free to watch and condemn such videos. It added it was, however, considering adding warnings.
One suicide prevention charity condemned the move.
“It only takes seconds of exposure to such graphic material to leave a permanent trace – particularly in a young person’s mind,” said Dr Arthur Cassidy, a former psychologist who runs a branch of the Yellow Ribbon Program in Northern Ireland.