The names of 400 electorates were removed from the roll by the Election Commission for different reasons and a revised list was sent to the centre, official sources said.
When these electorates went to cast their votes, they were asked to return following which they created ruckus.
On receiving the information, AAP party candidate Rajeev Agarwal also reached the spot and joined the protest.
Station officer of Sunghari Atul Pradhan took the AAP candidate and his supporters to the police station, sources said. However, the district administration denied that they were taken into custody.