An application would be filed before the Speaker K G Bopaiah soon seeking Vajjal's disqualification, BJP Chief Whip D N Jeevaraj told reporters after Yeddyurappa won the motion of confidence.
The BJP has already secured disqualification of 11 of its rebel MLAs, who have approached the High Court challenging the order.
Vajjal seemed to have been roped in by JD-S.
Sources in JD-S said the party was also contemplating a similar action against its Chennapatna MLA, M C Ashwath, who also remained absent. BJP is suspected to behind his absence today.
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