Using the TOF detector at the COSY storage ring the hadronic reaction pp \rightarrow {\Sigma }⁺ K⁰ p was measured exclusively at a beam momentum of 2.95 GeV/c. A narrow peak was observed in the invariant mass spectrum of the K⁰ p subsystem at 1530 \pm 5 MeV/c² with a significance of 4--6 standard deviations, depending on background assumptions. The upper limit of 18 \pm 4 MeV/c² (FWHM) for its width is given by the experimental resolution. Since a resonance in this subsystem must have strangeness S = + 1 we claim it to be the {\Theta }⁺ state for which very recently evidence was found in various experiments. To come to a final decision on the existence of the \Theta ⁺ very recently COSY-TOF performed a measurement which will give results with strongly improved statistical accuracy.

PACS numbers: 12.39.Mk, 13.75.Cs, 14.20.--c, 14.80.--j