Algiers - The coalition ally of Algeria’s ruling party called Wednesday for President Abdul Aziz Bouteflika to resign, piling pressure on the ailing leader after the army chief demanded he be declared unfit. Lieutenant General Ahmad Gaed Salah, addressing officers in a speech broadcast on Tuesday, said the solution to the biggest political crisis since the army cancelled elections in 1992 would be the exit of the president on health grounds.

In a statement signed by its leader, recently sacked prime minister Ahmad Ouyahia, the National Rally for Democracy (RND) said it “recommends the resignation of the president ... with the aim of smoothing the period of transition.”

Meanwhile, Algerians waited on Wednesday for a decision by the constitutional council on whether Bouteflika is fit for office.

The position taken by the powerful army chief of staff was a clear signal that the president - who has rarely appeared in public since suffering a stroke in 2013 - will not survive the protests which have threatened to topple the ruling elite.

The political turmoil has highlighted growing public discontent with the allegations of corruption, nepotism and economic mismanagement that have tarnished Bouteflika’s 20-year rule.

“This is a default solution following the failure of the negotiations on the departure of the President. It moves away from the democratic transition and approaches a framed succession,” said Hasni Abidi, a Swiss-based Algerian who heads a think tank.

That approach may break a deadlock for now. Protesters are pushing for an overhaul of the powerful establishment entrenched in power since independence from France in 1962, and the old guard hopes it can put forward a candidate approved by the army.

For years, rumours have swirled about potential successors, but no single credible candidate has emerged with the backing of the military, the political and security establishment who is not at least 70.

The next formal step is for the constitutional council to formally rule on Bouteflika’s fitness for office. The body has not said when it might reach its decision. Any ruling that he is not fit to rule would have to be ratified by members of parliament’s lower and upper house by a two-thirds majority.

Based on Article 102 of the constitution, the chairman of parliament’s upper house, Abdul Qader Bin Salah, would serve as caretaker president for at least 45 days in the nation of more than 40 million people.

The last time the army stepped in during a crisis was in 1992, when the generals cancelled an election that Islamists were poised to win.

That move triggered a civil war that killed an estimated 200,000 people.

The military remains highly sensitive to any signs of instability and Salah has warned he will not allow the demonstrations to lead to chaos.

The stakes are high, for Algeria is a leading member of OPEC and a top gas supplier to Europe, though so far oil and gas output appears unaffected by the unrest, an International Energy Agency (IEA) official said on Tuesday.

Algeria is also regarded by Western states as a partner in counter-terrorism, a significant military force in North Africa and a key diplomatic player in efforts to resolve crises in neighbouring Mali and Libya.