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We present the first Murchison Widefield Array observations of the well-knowncluster of galaxies Abell 3667 (A3667) between 105 and 241 MHz. A3667 is one ofthe best known examples of a galaxy cluster hosting a double radio relic andhas been reported to contain a faint radio halo and bridge. The origins ofradio halos, relics and bridges is still unclear, however galaxy clustermergers seems to be an important factor. We clearly detect the North-West (NW)and South-East (SE) radio relics in A3667 and find an integrated flux densityat 149 MHz of 28.1 +/- 1.7 and 2.4 +/- 0.1 Jy, respectively, with an averagespectral index, between 120 and 1400 MHz, of -0.9 +/- 0.1 for both relics. Wefind evidence of a spatial variation in the spectral index across the NW relicsteepening towards the centre of the cluster, which indicates an ageingelectron population. These properties are consistent with higher frequencyobservations. We detect emission that could be associated with a radio halo andbridge. How- ever, due to the presence of poorly sampled large-scale Galacticemission and blended point sources we are unable to verify the exact nature ofthese features.

The first Murchison Widefield Array low frequency radio observations of cluster scale non-thermal emission: the case of Abell 3667