Seven insurgents were killed in a military operation near where militants this week breached a US outpost in eastern Afghanistan, the Afghan Defense Ministry said Tuesday. Troops also nabbed an "Arab terrorist" in Monday's operation in the area of Wanat village in Nuristan province where nine American soldiers died in a militant attack over the weekend, a ministry statement said. The statement gave no further details and did not say whether foreign forces supported the Afghan army in the operation. NATO and US military officials were not immediately available for comment. US troops, meanwhile, disarmed the district police force and briefly detained the district chief and police chief for questioning at the US base, said Omar Sameh, a spokesman for district chief. Both were released within 24 hours, he said. Sameh did not say what the chiefs were questioned about.