Comments made by Sinn Fein's Martin McGuinness were tantamount to incitement to hatred, UUP health minister Michael McGimpsey has said.
Speaking to the BBC, Mr McGimpsey said Mr McGuinness was wrong to say his decision to postpone plans to build a radiotherapy unit at Altnagelvin Hospital was "sectarian".
Michael McGimpsey said the DUP and Sinn Fein were responsible for health budget cuts.
He claimed that the DUP finance minister, Sammy Wilson, had failed to respond to a business case for Altnagelvin Hospital which he had given him last October.
Mr Wilson also refused to commit to visiting Derry City Council to discuss the planned cancer unit.
Last month, Mr McGimpsey made the decision to postpone construction, saying his budget for capital spending was £500m short.