Spanish sculptor Juan Muñoz, who won critical acclaim with his current Double Bind exhibition at London's Tate Modern, died of a heart attack yesterday. Muñoz, who was 48, had been holidaying on the island of Ibiza. No further details were given. His speciality was installations showing groups of life-size figures in different poses with mysterious expressions. During the 1990s he created a series of sculptures called “conversation pieces” made up of large groups of figures apparently talking to one another. He is reported to have said his work was about a man in a room waiting for nothing. Muñoz won Spain's National Plastic Arts prize in 2000. His works, which show a fine sense of architecture and spaces, usually featured human figures and large installations, and were seen all over the world in exhibitions such as the DIA Foundation of New York, Documenta in Kassel, Aperto in Venice or the Chambre d'Amis in Gante. One of his works can be seen in the Spanish Contemporary Art Museum in Palma's Calle San Miguel. Shortly before the opening of his June exhibition in the Tate, he said that his spectacular installation was based on theories “developed to overcome schizophrenia.” He was married to sculptor Cristina Iglesias. He studied at the Central School of Art and Design and the Croydon School of Art in London and New York's Pratt Graphic Center.