Jordanian Prince Hamza bin al-Hussein (left), president of the Royal Aero Sports Club of Jordan, and his wife Princess Basma attend a media event to announce the launch of "Skydive Jordan" in the Wadi Rum desert on April 19, 2011. (KHALIL MAZRAAWI / AFP)

AMMAN - Jordan's Prince Hamza, half-brother of King Abdullah II of Jordan, signed a letter on Monday in which he said he will remain loyal to the king and committed to the country's constitution.

In the letter, published by the Royal Hashemite Court on its official Facebook page, Prince Hamza said, "I place myself in the hands of His Majesty."

Prince Hamza said he will remain loyal to the king and supportive of the king and Crown Prince Hussein and that he will continue to honor the legacy of the Hashemite family, according to a signed letter

The prince said he will remain loyal to the king and supportive of the king and Crown Prince Hussein and that he will continue to honor the legacy of the Hashemite family, according to the letter.

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Prince Hamza said the national interests of Jordan are above all considerations and that all should stand behind the king in supporting Jordan and the national interests.

Jordan's Deputy Prime Minister and Foreign Minister Ayman Safadi said Sunday that Prince Hamza, former minister and royal court chief Bassem Awadallah, and royal family member Sharif Hassan Ben Zeid have contacts with external powers to take some actions against the country.

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As part of a thorough security operation and investigation, Awadallah and Sharif Hassan, along with around 15 other persons, were arrested on Saturday for involvement in a plot, said Safadi.