Around 21.52 per cent of 1.38 crore voters exercised their franchise in the first four hours of polling in eight Lok Sabha seats of Bihar in the sixth phase on Sunday, election officials said.

A polling officer was killed at a polling station in a freak incident of firing by a home guard before polling started in Sheohar Lok Sabha seat. A few incidents of malfunctioning of Electronic Voting Machines were reported from various booths, the officials said.