  Aims. The magnetic fields of the member galaxies NGC 3628 and NGC 3627 show
morphological peculiarities, suggesting that interactions within the group may
be caused by stripping of the magnetic field. This process could supply the
intergalactic space with magnetised material, a scenario considered as a
possible source of intergalactic magnetic fields (as seen eg. in the Taffy
pairs of galaxies). Additionally, the plumes are likely to be the tidal dwarf
galaxy candidates.
  Methods. We performed radio continuum mapping observations at 2.64 GHz using
the 100-m Effelsberg radio telescope. We obtained total power and polarised
intensity maps of the Triplet. These maps were analysed together with the
archive data, and the magnetic field strength (as well as the magnetic energy
density) was estimated.
  Results. Extended emission was not detected either in the total power or the
polarised intensity maps. We obtained upper limits of the magnetic field
strength and the energy density of the magnetic field in the Triplet. We
detected emission from the easternmost clump and determined the strength of its
magnetic field. In addition, we measured integrated fluxes of the member
galaxies at 2.64 GHz and estimated their total magnetic field strengths.
  Conclusions. We found that the tidal tail hosts a tidal dwarf galaxy
candidate that possesses a detectable magnetic field with a non-zero ordered
component. Extended radio continuum emission, if present, is weaker than the
reached confusion limit. The total magnetic field strength does not exceed 2.8
{\mu}G and the ordered component is lower than 1.6 {\mu}G.
