A Greek man who has been working as a volunteer for a humanitarian organization in northwestern Pakistan since 1995 has been kidnapped from his home in an armed raid that resulted in the death of a police guard, reports in the Pakistani press said yesterday. According to the reports, a large group of masked gunmen burst into the home of the unidentified man in the area of the Chitral Valley and abducted him and a servant. The intruders are also said to have killed a guard during the raid. Reports in the English-language newspaper Dawn said that the kidnappers communicated in Pashto, a language spoken in neighboring Afghanistan. The area of Chitral is relatively peaceful but its proximity to Afghanistan makes it potentially risky. There had been no claim of responsibility for the abduction by late yesterday.