AMMAN, April 6, (AFP): The prosecutor general in Jordan's capital Amman on Tuesday banned the publication of any information about an alleged plot said to involve the king's half-brother, Prince Hamzah, state television said.    

"In order to keep the security services' investigation into Prince Hamzah and the others secret, (it is decided) to ban the publication of anything related to this inquiry at this stage," prosecutor Hassan al-Abdallat said in a statement.    

"The ban on publication involves all audiovisual media and social networks, as well as the publication of all images or video clips relating to this subject on pain of legal action," added the statement shown on television.    

The order came after Hamzah, who has been highly critical of the government, late Monday pledged loyalty to King Abdullah II, two days after being placed under house arrest.    

The government has accused Hamzah, an ex-crown prince, of a "wicked" plot and involvement in a seditious conspiracy to "destabilise the kingdom's security".    

Hamzah -- who said he was placed under house arrest, while at least 16 others were arrested -- had on Monday struck a defiant tone, insisting he would not obey orders restricting his movement. But in an apparent easing of the tensions, the 41-year-old prince later pledged his backing to King Abdullah.    

"I will remain... faithful to the legacy of my ancestors, walking on their path, loyal to their path and their message and to His Majesty," he said in a signed letter, quoted by the palace.    

"I will always be ready to help and support His Majesty the King and his Crown Prince," he is quoted as writing.    

Hamzah -- whom Abdullah stripped of the title of the crown prince in 2004 -- has emerged as a vocal critic, accusing Jordan's leadership of corruption, nepotism and authoritarian rule.    

In a video he sent to the BBC on Saturday, he lashed out at "incompetence that has been prevalent in our governing structure for the last 15 to 20 years and has been getting worse".    

"No-one is able to speak or express an opinion on anything without being bullied, arrested, harassed and threatened," he charged.