In Pakistan, four policemen were killed and 10 others were injured when militants blew up an explosive laden vehicle near a police check post in Peshawar today.<br/><br/>Peshawar police chief Liaqat Ali Khan told reporters that the militants wanted to enter the city to carry out an attack but detonated the explosives in their car when they were stopped at the check post. He said nearby buildings were also damaged by the blast.<br/>