Ireland's Public Prosecution Office has formally charged an Algerian and a Libyan held in the country in connection with an alleged a plot to kill Swedish cartoonist Lars Vilks.

The Algerian is accused of sending a threat by text message. The Libyan has been charged with an immigration offence after entering Ireland  under a false name and failing to produce identity papers.

The two were part of a group of seven alleged extremist Muslims arrested last week in Ireland on suspicion of threatening the life of the Swedish cartoonist. The five other people detained have been already been released without charge.

In 2007, Mr Vilks drew three cartoons depicting the Prophet Mohammed with the body of a dog. The drawings drew an angry response from much of the Islamic world. A group linked to al-Qaeda offered a 100,000 US dollar reward for anyone who killed the cartoonist.