The Bihar police have lodged 30 FIRs against thousands of persons, both named and unidentified, and arrested 17 people in connection with the recent violence and arson in Bihar's Madhubani district. Madhubani Superintendent of Police Ranjeet Kumar Mishra said on Thursday that the 30 FIRs were lodged at Town, Khajauli, Kaluwahi, Jai Nagar, Basopatti and Jai Nagar GRP police stations.