In Bihar, 15 employees of a private construction agency are yet to be traced who were kidnapped by Maoists in Jamui district.A supervisor of the construction company, who was also taken hostage by the ultras was however, released.AIR Patna correspondent reports that over one thousand jawans of STF, BSF, CRPF and district police have been pressed into service to rescue the abducted employees.Police sources said the ultras had not imposed any ultimatum as yet but were demanding a sizeable ransom.Maoists kidnapped employees of a private construction company near Balthar Ghat in Jamui on Monday night.