02/08/2011 11:13 BST | Updated 02/10/2011 06:12 BST

Karachi Violence Leaves At Least 31 People Dead

At least 31 people have been killed since Monday in the latest surge of violence in the Pakistani city of Karachi. It is thought that the armed groups involved in the killing are supported by some of Pakistan's main political parties, with senior politicians being accused by security forces of protecting some of the killers.