Bangkok, Thailand (AHN) – An estimated 20,000 to 50,000 people will join an anti-government rally in Bangkok, Thailand on Saturday afternoon and more than 5,000 police have been deployed in the capital to maintain law and order.

The protest organizer, the opposition group United Front of Democracy Against Dictatorship (UDD), plans to hold the demonstration in a park and at the Government House to demand the dismissal and prosecution of Foreign Minister Kasit Piromya and other government officials involved in the occupation of Bangkok’s international airport in November.

The police, with backups from the military, will try to prevent UDD’s so-called Red Shirts from repeating the occupation of the Government House by protesters from the rival group People’s Alliance for Democracy (PAD) last year.

PAD protesters occupied the building from August to September before laying siege on the airport to pressure the government to resign for allegedly being a puppet of former prime minister Thaksin Shinawatra, who is in exile after being ousted in a coup in 2006.

The PAD protest led to the resignation of then prime minister Somchai Wongsawat and his replacement by the Democrat Party’s Abhisit Vejjajiva.

Vejjajiva is out of Thailand attending the Word Economic Forum in Davos, Switzerland.