Factbox - Key winners at the 30th Independent Spirit Awards

SANTA MONICA, Calif. (Reuters) - The 30th Independent Spirit Awards handed out top accolades for the year's best achievements in independent film on Saturday. Below is a list of winners in key categories. BEST FEATURE "Birdman" BEST ACTOR Michael Keaton, "Birdman" BEST ACTRESS Julianne Moore, "Still Alice" BEST SUPPORTING ACTOR J.K. Simmons, "Whiplash" BEST SUPPORTING ACTRESS Patricia Arquette, "Boyhood" BEST DIRECTOR Richard Linklater, "Boyhood" BEST SCREENPLAY Dan Gilroy, "Nightcrawler" BEST DOCUMENTARY "CitizenFour" BEST INTERNATIONAL FILM "Ida," Poland BEST FIRST FEATURE "Nightcrawler" BEST FIRST SCREENPLAY Justin Simien, "Dear White People" BEST CINEMATOGRAPHY Emmanuel Lubezki, "Birdman" BEST EDITING Tom Cross, "Whiplash" ROBERT ALTMAN AWARD "Inherent Vice" JOHN CASSAVETES AWARD (for films made under $500,000) "Land Ho" (Reporting by Piya Sinha-Roy)