NEW : Suicide bomber in northwestern Pakistan kills at least three , authorities say . NEW : Suspect blew himself up after running out of bullets in gunfight , police say . In the last four weeks , authorities arrested three men with suicide vests who were plotting to carry out the attacks , said Interior Minister Rehman Malik . Pakistani authorities say they stopped plot on government buildings . Comment:
NEW : Suicide bomber in northwestern Pakistan kills at least three , authorities say . NEW : Suspect blew himself up after running out of bullets in gunfight , police say . Pakistani authorities say they stopped plot on government buildings . Comment: