47 percent polling in Bihar
"About 47 percent polling was recorded... It passed off peacefully barring some group clashes between supporters of rival candidates," said a police official. There were 15 lakh voters.
Police arrested a dozen troublemakers Sunday.
The seat fell vacant after the death of Rashtriya Janata Dal (RJD) MP Umashankar Singh.
The main candidates were Janata Dal-United's P.K. Sahi, the state education minister, RJD's Prabhunath Singh and Jitendra Swami of Congress who is the son of Umashankar Singh.
The JD-U was backed by the Bharatiya Janata Party while the RJD had the support of the Lok Janshakti Party.