Advance votings in at least six constituencies were cancelled on Sunday after anti-government protesters blocked the voting venues.
Nation Channel reported at about 9m that the voting in Bang Kapi, Bang Kolaem, Bangbon, Nongkham, Don Mueng, Laksi were already cancelled.
The voting were scheduled to open at 8.30am. Many unhappy voters were seen gathering at some voting venues as they wanted to cast the ballots.
The snap election is scheduled on February 2.