At least 30 people have been killed by a huge explosion in Afghanistan this afternoon, a senior official has said. As many as 60 other people were also injured by the car bomb which exploded around 7pm local time in Pul-a Alam, the provincial capital of Logar, provincial council leader Hasibullah Stanekzai said. Stanekzai also said that the car packed with explosives targeted a guesthouse in the city where dozens of people were living - including university students. In Afghanistan, guest houses are lodgings often provided for free by the government, usually for the poor, travelers and students. Stanekzai said that among the casualties were highschool students who had been staying at the house, having travelled to the capital to sit their university entrance exam, as well as pro-government militia members who were staying there while waiting for air transport to another distinct.