The Collaborative International Dictionary of English v.0.48:

News-writer \News"-writ`er\, n.
   One who gathers news for, and writes, news-letters, articles
   in news periodicals, or items for broadcast on news programs.
   [1913 Webster +PJC]

WordNet (r) 3.0 (2006):

newswriter
    n 1: a journalist employed to provide news stories for
         newspapers or broadcast media [syn: correspondent,
         newspaperman, newspaperwoman, newswriter, pressman]