New Zealand will extend its deployment of 140 troops in Afghanistan for another year, then start withdrawing troops while posting civilian development specialists to the war-ravaged country, Prime Minister John Key said Tuesday. Key spoke after a three-day visit to Afghanistan, where he held talks with President Hamid Karzai and the commander of international forces, Gen. Stanley McChrystal. He also visited New Zealand troops serving in the capital, Kabul, and in Bamiyan province. New Zealand's 140-strong provincial reconstruction team of troops in Bamiyan had been expected to end their seven-year deployment in September, but Key said the posting will roll over for another year, then start reducing as civilian specialists are introduced.