A week of brutally repressed anti-government protests in Nicaragua has killed at least 34 people, a leading rights group in the country said Wednesday.

The Nicaraguan Center for Human Rights (CENIDH) said it revised upwards its previous figure of 27 after finding more bodies in Managua's state morgue of people previously reported missing, and also adding people who succumbed in hospitals to wounds sustained in the protests.

President Daniel Ortega's government has not put out an official death toll since Friday, when it counted 10 deaths.

The protests were triggered by pension reforms that Ortega ended up withdrawing amid mounting condemnation of the harsh police tactics against the demonstrators.

Other grievances have also surfaced, notably resentment at the aloof and authoritarian style of Ortega and his wife Rosario Murillo, who is his vice president.

The unrest was the worst Ortega has faced in the past 11 years of his current stretch in power.

A mass march in Managua on Monday brought together tens of thousands of ordinary Nicaraguans, many of them calling for him to step down.

- Calm returning -

By early Wednesday, the protests appeared to subside after Ortega made a series of concessions, including freeing dozens of arrested protesters, lifting curbs on independent media and calling for dialogue.

Makeshift road blocks had been cleared and traffic in the capital was returning to normal. There was no more of the looting and panic buying that had characterized the worst of the unrest over the weekend.

Schools were also reopening, after the government had ordered them closed Thursday as the street violence spread to towns and cities across the country.

But some Nicaraguans adopted a wait-and-see attitude over whether tensions were dissipating or merely in a lull.

"We are going to see how long this calm lasts," said Managua taxi driver Alan Saavedra.

"I'm not sending my daughter to class because I still don't see it as stable," he said.

- Talks mooted -

Relatives and colleagues of policewoman Juana Francisca Aguilar, who died after being injured during clashes, carry her coffin during her funeral in the city of Jinotepe on April 24, 2018 RODRIGO ARANGUA, AFP

The capital's archbishop, Leopoldo Brenes, has put himself forward as a mediator in talks called by Ortega.

The head of the country's powerful employers' union COSEP, Jose Aguerri, told AFP that conditions were coming together for dialogue to take place.

"We had said that the conditions for us to sit down were that there must be freedom of expression, freedom to gather together, the freeing of detainees.... This has happened. Now we are waiting for the Episcopal Conference (the bishops) to make the decision" to start talks, he said.

COSEP had abandoned a longstanding alliance with Ortega when public anger erupted over the deadly force used by his security forces and government-linked groups against protesters.

Winning back the business leaders' support is seen as key for Ortega to restore his authority.

Any talks with them are expected to return to the controversial issue of pension reform that triggered the wave of violence.

Factfile on Nicaragua Nicolas RAMALLO, Gustavo IZUS, AFP

The Nicaraguan Social Security Institute is on track to go broke within a year or two on its current trajectory.

The abandoned reforms had sought to increase employee and employer contributions while cutting benefits to cap a deficit for the agency that has ballooned to $76 million.

But that issue is now just one part of a panoply of public grievances that have led even former supporters to reject Ortega, a one-time Sandinista guerrilla who has ruled over the country for 22 of the past 39 years.

"The people are tired of being repressed, of being intimidated," said Eliza Rodriguez, a resident of Leon, a Sandinista bastion northwest of the capital.

Carlos Gutierrez, a 26-year-old who watched a university building be torched in the town during the unrest, added: "We need total change. More freedom. More official support for the people, and no more authorities hurting the people."