  We report the GMRT observations of V4641 Sgr during the May 2002 outburst at
radio frequencies of 610 and 244 MHz. This is the lowest frequency radio
detection of this source. The present low frequency radio observations clearly
showed spectral evolution from the optically thick to thin state. This behavior
is broadly consistent with the expanding bubble model. However, the flux
densities observed at lower frequencies are much higher than predicted by this
model. In the conical jet model, this discrepancy could be reconciled.
