  Charmed scalar mesons are studied. By assigning the newly observed charmed
strange meson with a narrow width to one of the iso-triplet four-quark mesons,
decays of the multiplet members are investigated and, as the consequence,
existence of additional narrow scalar mesons is predicted. Decays of the
ordinary charmed scalar mesons are also studied. In addition, it is
demonstrated that four-quark mesons can play an important role in hadronic weak
decays of charm mesons.
