The French presidency says Emmanuel Macron will acknowledge that his country set up a system that led to torture during Algeria's struggle for independence 60 years ago.

Although French generals have previously confirmed that opponents were tortured during the eight-year conflict, it will be the first time that a French president has admitted that the state facilitated abuses.

His acknowledgement will come during a visit to the widow of Maurice Audin, who disappeared in what is known as the Battle of Algiers in 1957.

Researchers say Audin, a maths professor at Algiers University and a pro-independence activist, was tortured for several days after being arrested at his home on suspicion of sheltering armed militants.

His widow, Josette, was told he had escaped while being transferred, though it is believed he was executed.

Mr Macron, the first French president to be born after the war, will also announce the opening of archives relating to disappearances during the conflict.