The experiment E325 has been carried out at KEK-PS to investigate nuclear media effects on the invariant mass spectra of rho, omega and phi mesons through their decays in the e(+)e(-) K(+)K(-) channels. From the earlier data, the experiment ha's reported the signature of in-medium mass modification of rho and/or omega mesons for the first time. This manuscript describes our preliminary results based on the data aquired in the allocated beam time of similar to3200 hours, which ended in February 2002.