We present the first Murchison Widefield Array observations of the well-known cluster of galaxies Abell 3667 ( A3667 ) between 105 and 241 MHz .
A3667 is one of the best known examples of a galaxy cluster hosting a double radio relic and has been reported to contain a faint radio halo and bridge .
The origins of radio halos , relics and bridges is still unclear , however galaxy cluster mergers 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 density at 149 MHz of 28.1 \pm 1.7 and 2.4 \pm 0.1 Jy , respectively , with an average spectral index , between 120 and 1400 MHz , of -0.9 \pm 0.1 for both relics .
We find evidence of a spatial variation in the spectral index across the NW relic steepening towards the centre of the cluster , which indicates an ageing electron population .
These properties are consistent with higher frequency observations .
We detect emission that could be associated with a radio halo and bridge .
However , due to the presence of poorly sampled large-scale Galactic emission and blended point sources we are unable to verify the exact nature of these features .