A liquid-gas phase transition in the fragmentation of Pb nucleus at 158 AGeV energy has been investigated. The results of the analysis of moments of the charge distributions of fragments are consistent with the postulated occurrence of a liquid-gas phase transition in the process of fragmentation of heavy nuclei. Values of critical exponents are found and compared to those obtained at lower energies.

PACS numbers: 25.75.-q, 29.40.Rg