He served until his sudden death in the Copenhagen apartment of his mistress Mariann Fischer Boel, who was at the time Minister for Foods and Agriculture. She publicly announced the death after she had talked to his wife. She continued her work and went on to become the European Commissioner for Agriculture.[1]
^"Press release" (in Danish). Ministeriet for Fødevarer, Landbrug og Fiskeri. 11 March 2003. Retrieved 19 July 2021. - Anders Langballe, Elisabet Svane and Troels Mylenberg (12 March 2003). "Døde i sin venindes lejlighed". Ekstra Bladet (in Danish). Retrieved 19 July 2021. - "Ikke uden overraskelser". Nyhederne (in Danish). 2 August 2004. Retrieved 19 July 2021. - Se og Hør reported that Hansen died in her apartment, and that the two had had a relationship running for years. "Fischer Boel initially tried to hide what had happened, but it naturally escaped. She was otherwise on the verge of taking over the chairmanship of the Folketing, but when the circumstances surrounding Ivar Hansen's death came to light, there was broad agreement that it was hardly appropriate anymore.Today, Mariann Fischer Boel sits far from Denmark as EU Commissioner in Brussels." Se og Hør, 27 March 2008.