ALGIERS (Reuters) - Algeria’s army chief renewed a call for President Abdelaziz Bouteflika to be declared unfit for office and told opponents not to seek to undermine the military, after weeks of protests demanding an end to the ailing leader’s 20-year rule.

FILE PHOTO: Algeria's President Abdelaziz Bouteflika gestures while talking with Army Chief of Staff General Ahmed Gaed Salah during a graduation ceremony of the 40th class of the trainee army officers at a Military Academy in Cherchell 90 km west of Algiers, Algeria June 27, 2012. REUTERS/Ramzi Boudina//File Photo

Bouteflika, 82, who has rarely been seen in public in recent years, has faced mass demonstrations for more than a month. His announcement that he would not seek a fifth term but that he would not quit immediately has failed to assuage protesters.

To break the stalemate, Army Chief of Staff Lieutenant General Ahmed Gaed Salah made a proposal on Tuesday for the constitutional council declare Bouteflika unfit for office, a move provided for under article 102 of the charter.

Salah said in a statement issued by the Defense Ministry on Saturday that most people supported the army’s plan but some were resisting, without naming those opposed to the move.

He said these opponents had met on Saturday to start a media campaign against the army claiming people were against Salah’s proposals.

He said trying to undermine the military, a revered institution in Algeria whose support has long been seen as vital to keeping Bouteflika and the ruling elite in power, was a “red line” that should not be crossed. He did not elaborate.

“All that emerges from these suspicious meetings of proposals that do not conform to constitutional legitimacy or undermine the national army, which is a red line, is totally unacceptable,” he said in the statement.

Bouteflika established himself in the early 2000s by ending a civil war that had claimed 200,000 lives. But he has rarely been seen in public since suffering a stroke in 2013, and now faces the biggest crisis of his two-decade rule.

Under the constitution, the chairman of parliament’s upper house, Abdelkader Bensalah, would serve as caretaker president for at least 45 days if Bouteflika stepped down.

However, there is no obvious long-term successor to rule the nation which secured independence from France in 1962 after years of conflict and was embroiled in a bloody Islamist insurgency during the 1990s.