KABUL: Two Afghan police officers were killed in a clash with foreign troops conducting a night raid southwest of the Afghan capital, Kabul, early on Saturday, a provincial police chief said, adding to Afghan pressure to stop the raids.Night raids, which foreign troops say are one of their most effective weapons in the fight against insurgents, are a major cause of friction between President Hamid Karzai and his Western backers. Karzai has said repeatedly he wants them stopped.Saturday’s incident happened when the soldiers, who were involved in a night raid which had not been coordinated with the police, ignored orders to halt when spotted by officers in Ghazni province, said Ghazni police chief Zorawar Zahid.Shots were fired in the...