A bomb exploded at a crowded bus station in the northeast Nigerian town of Potiskum on Tuesday, killing at least 10 people in the second attack there since the weekend, Reuters reported. A security source confirmed the blast and a source at the nearest hospital said 10 bodies had so far been brought in. It was the second attack on Potiskum since Sunday, when a young girl with explosives strapped to her killed five people and wounded dozens at a security checkpoint outside a market. No one claimed responsibility for Tuesday's bombing.