A bomb exploded in the main southern Afghan city of Kandahar on Monday, killing four people and wounding three others, officials said.
The bomb was hidden outside the home of a former militia commander who was allied to the U.S.-backed Northern Alliance, which swept the Taliban from power in late 2001, said deputy police chief Abdul Hakim Hungar.
The blast killed the former commander, Agha Shah, a supporter of President Hamid Karzai, as well as three other civilian passers-by, he said. The three injured were rushed to hospital.
He said it was not immediately clear if the blast was because of a personal dispute or was an attack by Taliban rebels.
The bombing came a day after a suicide attack in the city injured four British government officials, reports the AP. I.L.