Protesters gather at an entrance of SK Olympic Handball Gymnasium in Seoul's eastern ward of Songpa, Saturday, in protest of ballot shortages in the local elections. Yonhap

Protests over ballot shortages entered their second day Saturday, with thousands encircling a vote-counting facility in eastern Seoul and demanding a new election.

By 12:35 p.m., approximately 2,000 people had gathered around SK Olympic Handball Gymnasium in Songpa Ward, according to police, claiming Wednesday's local elections were fraudulent.

Protesters blocked entrances, trapping an estimated 20-30 officials inside. About 400 police officers were deployed to the scene. No clashes have been reported.

The unrest stemmed from the shortage of ballot paper at more than a dozen polling stations across Seoul on Wednesday, including in Songpa and Gangnam, forcing temporary voting suspensions. Some voters are believed to have left without casting their ballots.