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We show that the blazar PKS 1424+240, which has been recently associated byIceCube with a neutrino excess at the $3.3\,\sigma$ level together with threeother sources, is similar to the first plausible non-stellar neutrino source,TXS 0506+056, in being also a masquerading BL Lac object, i.e., intrinsically aflat-spectrum radio quasar with hidden broad lines and a standard accretiondisk. We point out that these two sources share other properties, includingspectral energy distribution, high powers, parsec scale properties, andpossibly radio morphology. We speculate that the relatively rare combination ofproton-loaded jets, possibly typical of high-excitation sources, and efficientparticle acceleration processes, related to their relatively high synchrotronpeak frequencies, might favour neutrino production in these two sources. GB6J1542+6129, which has also recently appeared twice in a list of IceCubeassociations, seems also to belong to this rare blazar sub-class, whichincludes at most ~ 20 Fermi-4LAC blazars.

PKS 1424+240: yet another masquerading BL Lac object as a possible IceCube neutrino source