Axial vector tetraquark with S = +2

The possibility of an axial-vector isoscalar tetraquark with udss is discussed. If the pentaquark {theta}{sup +}(1540) has the (qq){sub 3}(qq){sub 3}q configuration, the isoscalar udss ({theta}{sup +}-meson) state with J{sup P}=1{sup +} is expected to exist in the mass region lower than, or close to, the mass of {theta}{sup +}(1540). Within a flux-tube quark model, a possible resonant state of udss(J{sup P}=1{sup +}) is suggested to appear around 1.4 GeV with the width O(20{approx}80) MeV. We propose that the {theta}{sup +}-meson is a good candidate for the tetraquark search, which would be observed in the K{sup +}K{sup +}{pi}{sup -} decay channel.