Akhter Gulfam / EPA

Smoke rises from the site of a bomb blast in Spin Boldak, Kandahar province, Afghanistan, on March 7, 2012.

A motorcycle bomb in southern Afghanistan killed four civilians and injured eight on Wednesday morning, the European Pressphoto Agency reports. The bomb exploded in a crowded area in Spin Boldak, a town along the Pakistan border, according to Parwiz Najib, a senior official in the provincial governor's office.

Elsewhere, six British soldiers were feared killed after an explosion hit their armored vehicle in the southwest of the country, Britain's Ministry of Defense said.

Akhter Gulfam / EPA

Afghan police tranfer an injured victim to a local hospital in Spin Boldak on March 7, 2012.