In Afghanistan four people have been killed and thirteen others injured when a suicide bomber attack in southern Afghanistan province inside a mosque on Thursday. Official sources said a memorial service for the President Karzai’s assassinated half brother, was going on when the suicide bomber blew himself up inside the mosque. The mosque in the southwest Kandhar was filled with relatives and friends of Karzai family at the time of attack. President Karzai's half brother, Ahmed Wali Karzai, was killed by his own body guard on Tuesday at his home in Kandhar. No one immediately claimed responsibility for the attack.