The BJP leader from Sitamarhi allegedly got off the car and ran after he hit the children on Saturday. The complaint -- filed by a man who lost five grandchildren in the accident -- also said footage from CCTV cameras in the area showed Mr Baitha was driving the car.
In a tweet today, Mr Gandhi hit out at prohibition - a project close to the heart of the Chief Minister, which also brought him a chunk of votes during the 2015 assembly elections in the state. He also took a dig at Mr Kumar's "voice of conscience" -- a reference to the time he had dumped the Congress and the Lalu Yadav to partner with the BJP to form a new government in the state.
His tweet, in Hindi, read: "In alcoholism-free Bihar, a drunk BJP leader crushed nine innocent children to death. Nitish ji, is this the truth behind your prohibition? Who is your voice of conscience protecting today -- the accused BJP leader or the truth about alcohol in Bihar?"
Lalu Yadav's RJD has threatened the government with huge protests unless Manoj Baitha is arrested by Monday. The BJP leader has been on the run since the accident. "Till Baitha is arrested, agitation from road to floor of the assembly will continue," said Tejasvi Yadav.
The BJP has not denied that the accused leader belongs to the party, but said he is not an office bearer, as some reports have said.
Get the latest election news, live updates and election schedule for Lok Sabha Elections 2019 on ndtv.com/elections. Like us on Facebook or follow us on Twitter and Instagram for updates from each of the 543 parliamentary seats for the 2019 Indian general elections.