"The prerogative to take any action against former MLA Arvind Khanna is vested in the party high command as he was a member of the AICC," Bajwa said in a late night statement issued here.
Further clarifying on the issue, Bajwa said that it was due to "some communication gap" that he got the impression that Khanna had been expelled from the party for six years.
Bajwa was talking to reporters here on the sidelines of 10th death anniversary of Sant Ram Singla, father of former Sangrur Congress MP Vijay Inder Singla.
Bajwa accused Khanna of being hand-in-glove with Punjab Deputy Chief Minister Sukhbir Singh Badal and entering into a deal that he would be elevated to Rajya Sabha in 2016.
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Khanna, a close confidant of senior Congress leader Amarinder Singh, won the Assembly elections in 2002 and 2012.
The bypoll was necessitated after Khanna resigned from the Assembly in January.