The senior BJP leader's attack on Lalu Prasad's party was made in the context of attack on CM's cavalcade in a village in Buxar district on January 12 last.
BJP is a coalition partner of Nitish Kumar government in Bihar.
"Police had seized a huge quantity of liquor from Nandan village of Buxar district. The attack on the Chief Minister was a planned one, aimed at seeking vengeance for the operation", Sushil Modi tweeted.
The Chief Minister had banned sale and consumption of alcohol in the state nearly two years ago.
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In the tweet, Sushil Modi also said "those who had once stood joining hands in favour of prohibition, have today sided with the liquor mafia".
The remark was an obvious reference to RJD supremo Lalu Prasad, currently in jail in connection with a fodder scam case, who had stood beside the Chief Minister on January 21 last when a state-wide human chain was formed in support of the prohibition drive.
The BJP, which was in the opposition, immediately came up with the offer of support to Kumar following which a new government was installed in the state.
Sushil Modi also lambasted the opposition party for "weaving false tales of dissatisfaction with development works" and said "both wards under the village enjoy facilities like electricity and tap water".
The RJD has been claiming that the stone-pelters were Dalits living in nearby localities who wanted to draw the CM's attention towards alleged lack of amenities in their area.