公こう務む中ちゅう

noun, adverb

on duty; while on official business

Used for public officials, civil servants, or employees when they are engaged in official duties. Often appears in formal contexts or news reports.

• 公こう務む中ちゅうの警けい察さつ官かんが事じ故こに遭あった。

  A police officer on duty was involved in an accident.

• 公こう務む中ちゅうは私し用よう電でん話わを控ひかえてください。

  Please refrain from personal calls while on official duty.