At least five people were reportedly killed in an explosion in North Waziristan tribal agency of Pakistan, bordering Afghanistan, according to tribal officials. Officials said that a bomb explosion took place Thursday afternoon near Stadium Chowk in Miramshah, the agency\'s main city. They said the explosion killed five persons and wounded at least two others. Security forces cordoned Aoff the area and were conducting investigations. Meanwhile the US military said earlier Wednesday it plans to reduce the number of American troops in Pakistan after Islamabad made a formal request, amid tensions between the two countries. \"We were recently notified in writing that the government of Pakistan wished for the US to reduce its footprint in Pakistan,\" spokesman Colonel Dave Lapan said.