Thai authorities threaten a crackdown on anti-government protests that have sparked fears of another military coup. It comes a day after the resignation of cabinet minister Jakrapob Penkair in an attempt to stem the demonstrations.
Penakir is accused by police of making offensive remarks about the king. Prime Minster Samak Sundaravej went on national televison to issue the warning.
The street protests began last Sunday and observers say they are similar to the campaign waged against Prime Minister Thaksin Shinawatra before a 2006 coup.
The pro-Taksin government faces an alliance of the royalist establishment, the army and the opposition Democratic Party who mustered 100,000 to march against the former prime minister.
There are fears that the army might seize the chance of social unrest to get their hands on power once again.