Taliban guerrillas shot dead an Afghan intelligence official on Wednesday, the second senior security officer to be killed in 24 hours. The provincial intelligence official, Abdul Hakim, was gunned down as he was walking to his office in Ghazni province, southwest of the capital, the provincial police chief said. One of the gunmen was captured as he tried to flee on a motorbike, said the police chief, Abdur Rahman Sarjang, who said the attackers were Taliban.