Copenhagen - A Danish court on Wednesday extended the custody of a Somali-born man charged with the attempted murder of the cartoonist at the centre of a worldwide controversy in 2005 over images depicting the Muslim Prophet Mohammed.

The 28-year-old man was arrested on January 1 for allegedly breaking into the home of cartoonist Kurt Westergaard in western Denmark and threatening him.

Westergaard's controversial cartoon of the Prophet Mohammed with a bomb in his turban was one of 12 images published in September 2005 by Jyllands-Posten. The images sparked outrage among Muslims and violent protests worldwide in early 2006.

The suspect would be held a further four weeks, the court ruled. He was shot in the hand and knee on the night of his arrest after he allegedly threw an axe at a police officer and threatened him with a knife.

He has denied all the charges against him, including terrorism, which could lead to a he could fact longer sentence if convicted.

The cartoonist sought refuge in a specially-reinforced room on the night of the attack, which the Danish Security and Intelligence Service (PET) deemed a terrorism-related.

According to the PET, the suspect has ties with the radical Islamist al-Shabaab militia and al-Qaeda in East Africa.