Thai police on Tuesday sought an arrest warrant against Suthep Thaugsuban, key organizer of the ongoing anti-government movement for leading protesters to occupy several ministries and state agencies.

Suthep is accused of agitating public to intrude into the Finance Ministry and Foreign Ministry and their affiliated agencies. He vowed Tuesday to stay put inside the compound of the Finance Ministry, making it another stronghold of the prolonged rallies.

The former Democrat MP said he was not worried by the government's threat of legal actions against him and other protest leaders.

The Anti-government protesters said on Tuesday that they plan lay siege to four more ministries, the Bangkok Post reported.

The four ministries are the Agriculture and Cooperatives Ministry, the Tourism and Sports Ministry, the Transport Ministry and the Interior Ministry, said the report.

The escalating bid to overthrow the so-called Thaksin's regime, led by the opposition Democrats, has forced Prime Minister Yingluck Shinawatra to declare the enforcement of the Internal Security Act throughout Bangkok and its adjacent provinces.