London: Nobel Peace prize winner Malala Yousafzai today said she is "heartbroken" by "the senseless and cold blooded" killing of scores of children by Taliban militants at an army-run school in Pakistan.

"I am heartbroken by this senseless and cold blooded act of terror in Peshawar that is unfolding before us. Innocent children in their school have no place in horror such as this," Malala said in a statement.