Videotape sculptures and war trauma paintings make Turner prize shortlist

Nnena Kalu, who creates large-scale installations that have been described as ‘a dumpster-diver’s dream’. Photograph: Courtesy of the Artist and ActionSpace

An artist who creates swirling sculptures out of fabric and old videocassette tape, and another who installed huge paintings evoking wartime trauma in the genteel rooms of Blenheim Palace, have been shortlisted for this year’s Turner prize.

Nnena Kalu, a Scottish-born, London-based artist, and Mohammed Sami, who fled his native Iraq as a refugee, have been chosen alongside Rene Matić and Zadie Xa to compete for the contemporary art prize.