Fighting in southern Afghanistan killed 6 Afghan police Sunday and a roadside bomb killed an Afghan soldier in the same region, the government said. The clash in Helmand province started when insurgents attacked a police checkpoint in Nahri Saraj district in the early morning, the Interior Ministry said in a statement. Police arrested one of the attackers and sent search teams out to chase others, it said. Meanwhile, a roadside bomb in Zabul province killed one Afghan army soldier and wounded three others, the Defense Ministry was quoted as saying by Associated Press.