A recent measurement of the neutrino velocity by the OPERA experiment and the prediction of energy loss of superluminal neutrinos via the pair creation process ν → νe+e− stimulated a search of isolated e+e− pairs in detectors with good tracking capability traversed by a large flux of high-energy neutrinos like NOMAD. NOMAD has already searched for similar topologies. These results can be reinterpreted to provide stringent limits on special-relativity-violating parameters separately for each ν species.