 A police in Pakistan have begun investigating a bomb attack in a residential area of Pakistan's eastern city of Lahore, which killed four people on Wednesday, including a child and wounded 14. No one has claimed responsibility for the attack. Those wounded by the powerful blast in a residential area include local people and some police officers who were manning a checkpoint. Provincial Police Chief Inam Ghani said the police were investigating whether the explosives had been detonated remotely or by a suicide bomber.